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690529 = 7234289
BaseRepresentation
bin10101000100101100001
31022002020011
42220211201
5134044104
622444521
75604130
oct2504541
91262204
10690529
11431894
12293741
131b23c8
1413d917
15d9904
hexa8961

690529 has 8 divisors (see below), whose sum is σ = 823680. Its totient is φ = 566016.

The previous prime is 690511. The next prime is 690533. The reversal of 690529 is 925096.

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 690529 - 213 = 682337 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 690529.

It is not an unprimeable number, because it can be changed into a prime (690509) 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, 1984 + ... + 2305.

It is an arithmetic number, because the mean of its divisors is an integer number (102960).

2690529 is an apocalyptic number.

It is an amenable number.

690529 is a deficient number, since it is larger than the sum of its proper divisors (133151).

690529 is a wasteful number, since it uses less digits than its factorization.

690529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4319.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 690529 is about 830.9807458660. The cubic root of 690529 is about 88.3881357650.

The spelling of 690529 in words is "six hundred ninety thousand, five hundred twenty-nine".

Divisors: 1 7 23 161 4289 30023 98647 690529