690875031 has 48 divisors (see below), whose sum is σ = 1169514752. Its totient is φ = 355069440.

The previous prime is 690874999. The next prime is 690875039. The reversal of 690875031 is 130578096.

It is not a de Polignac number, because 690875031 - 2⁵ = 690874999 is a prime.

It is a super-2 number, since 2×690875031² = 954616616918501922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690875039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 245076 + ... + 247878.

Almost surely, 2^690875031 is an apocalyptic number.

690875031 is a deficient number, since it is larger than the sum of its proper divisors (478639721).

690875031 is a wasteful number, since it uses less digits than its factorization.

690875031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2932 (or 2921 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 690875031 is about 26284.5017263025. The cubic root of 690875031 is about 884.0289735970.

The spelling of 690875031 in words is "six hundred ninety million, eight hundred seventy-five thousand, thirty-one".