689899431 has 16 divisors (see below), whose sum is σ = 1001760480. Its totient is φ = 419781120.

The previous prime is 689899411. The next prime is 689899517. The reversal of 689899431 is 134998986.

It is a de Polignac number, because none of the positive numbers 2^k-689899431 is a prime.

It is a super-2 number, since 2×689899431² = 951922449788247522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689899411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95910 + ... + 102851.

It is an arithmetic number, because the mean of its divisors is an integer number (62610030).

Almost surely, 2^689899431 is an apocalyptic number.

689899431 is a deficient number, since it is larger than the sum of its proper divisors (311861049).

689899431 is a wasteful number, since it uses less digits than its factorization.

689899431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198866.

The product of its digits is 3359232, while the sum is 57.

The square root of 689899431 is about 26265.9367051701. The cubic root of 689899431 is about 883.6126585799.

The spelling of 689899431 in words is "six hundred eighty-nine million, eight hundred ninety-nine thousand, four hundred thirty-one".