689866497 has 32 divisors (see below), whose sum is σ = 1096156800. Its totient is φ = 427467456.

The previous prime is 689866493. The next prime is 689866523. The reversal of 689866497 is 794668986.

689866497 is a `hidden beast` number, since 6 + 89 + 8 + 66 + 497 = 666.

It is not a de Polignac number, because 689866497 - 2² = 689866493 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689866493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14503 + ... + 39875.

It is an arithmetic number, because the mean of its divisors is an integer number (34254900).

Almost surely, 2^689866497 is an apocalyptic number.

It is an amenable number.

689866497 is a deficient number, since it is larger than the sum of its proper divisors (406290303).

689866497 is a wasteful number, since it uses less digits than its factorization.

689866497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25454 (or 25448 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The square root of 689866497 is about 26265.3097640214. The cubic root of 689866497 is about 883.5985979013.

The spelling of 689866497 in words is "six hundred eighty-nine million, eight hundred sixty-six thousand, four hundred ninety-seven".