690319557 has 16 divisors (see below), whose sum is σ = 1025640000. Its totient is φ = 458888112.

The previous prime is 690319537. The next prime is 690319577. The reversal of 690319557 is 755913096.

690319557 is a `hidden beast` number, since 6 + 90 + 3 + 1 + 9 + 557 = 666.

It is an interprime number because it is at equal distance from previous prime (690319537) and next prime (690319577).

It is not a de Polignac number, because 690319557 - 2⁷ = 690319429 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690319517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27207 + ... + 46052.

It is an arithmetic number, because the mean of its divisors is an integer number (64102500).

Almost surely, 2^690319557 is an apocalyptic number.

It is an amenable number.

690319557 is a deficient number, since it is larger than the sum of its proper divisors (335320443).

690319557 is a wasteful number, since it uses less digits than its factorization.

690319557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73617 (or 73611 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 45.

The square root of 690319557 is about 26273.9330325705. The cubic root of 690319557 is about 883.7919858389.

The spelling of 690319557 in words is "six hundred ninety million, three hundred nineteen thousand, five hundred fifty-seven".