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690986069 = 5314718863
BaseRepresentation
bin101001001011111…
…001110001010101
31210011012201200122
4221023321301111
52403343023234
6152322121325
723060166434
oct5113716125
91704181618
10690986069
11325053074
121734b0245
13b02045c7
1467aad11b
15409e192e
hex292f9c55

690986069 has 8 divisors (see below), whose sum is σ = 704581632. Its totient is φ = 677411280.

The previous prime is 690986059. The next prime is 690986071. The reversal of 690986069 is 960689096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 690986069 - 228 = 422550613 is a prime.

It is a super-2 number, since 2×6909860692 = 954923495104145522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

690986069 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 690986069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690986059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73532 + ... + 82394.

It is an arithmetic number, because the mean of its divisors is an integer number (88072704).

Almost surely, 2690986069 is an apocalyptic number.

It is an amenable number.

690986069 is a deficient number, since it is larger than the sum of its proper divisors (13595563).

690986069 is a wasteful number, since it uses less digits than its factorization.

690986069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10387.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 690986069 is about 26286.6138747462. The cubic root of 690986069 is about 884.0763316798.

The spelling of 690986069 in words is "six hundred ninety million, nine hundred eighty-six thousand, sixty-nine".

Divisors: 1 53 1471 8863 77963 469739 13037473 690986069