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1690000691 = 24157112281
BaseRepresentation
bin110010010111011…
…0101110100110011
311100210000221010012
41210232311310303
511430120010231
6435410325135
756610524501
oct14456656463
94323027105
101690000691
11797a63595
123b1b897ab
1320c188112
14120641671
159d57ae2b
hex64bb5d33

1690000691 has 8 divisors (see below), whose sum is σ = 1700123568. Its totient is φ = 1679904000.

The previous prime is 1690000687. The next prime is 1690000727. The reversal of 1690000691 is 1960000961.

It is a happy number.

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 1690000691 - 22 = 1690000687 is a prime.

It is a super-2 number, since 2×16900006912 = 5712204671160954962, which contains 22 as substring.

1690000691 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1690000621) 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, 131471 + ... + 143751.

It is an arithmetic number, because the mean of its divisors is an integer number (212515446).

Almost surely, 21690000691 is an apocalyptic number.

1690000691 is a deficient number, since it is larger than the sum of its proper divisors (10122877).

1690000691 is a wasteful number, since it uses less digits than its factorization.

1690000691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13093.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 1690000691 is about 41109.6179865491. The cubic root of 1690000691 is about 1191.1385875389.

The spelling of 1690000691 in words is "one billion, six hundred ninety million, six hundred ninety-one", and thus it is an aban number.

Divisors: 1 241 571 12281 137611 2959721 7012451 1690000691