689496931 has 8 divisors (see below), whose sum is σ = 730439424. Its totient is φ = 648597120.

The previous prime is 689496919. The next prime is 689496949. The reversal of 689496931 is 139694986.

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 689496931 - 2¹⁵ = 689464163 is a prime.

It is a super-2 number, since 2×689496931² = 950812035716837522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689496971) 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, 26281 + ... + 45493.

It is an arithmetic number, because the mean of its divisors is an integer number (91304928).

Almost surely, 2^689496931 is an apocalyptic number.

689496931 is a deficient number, since it is larger than the sum of its proper divisors (40942493).

689496931 is a wasteful number, since it uses less digits than its factorization.

689496931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21341.

The product of its digits is 2519424, while the sum is 55.

The square root of 689496931 is about 26258.2735723429. The cubic root of 689496931 is about 883.4407865328.

The spelling of 689496931 in words is "six hundred eighty-nine million, four hundred ninety-six thousand, nine hundred thirty-one".