689037172 has 12 divisors (see below), whose sum is σ = 1218246820. Its totient is φ = 340966656.

The previous prime is 689037163. The next prime is 689037211. The reversal of 689037172 is 271730986.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 160680976 + 528356196 = 12676^2 + 22986^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887547 + ... + 888322.

Almost surely, 2^689037172 is an apocalyptic number.

It is an amenable number.

689037172 is a deficient number, since it is larger than the sum of its proper divisors (529209648).

689037172 is a wasteful number, since it uses less digits than its factorization.

689037172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775970 (or 1775968 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 689037172 is about 26249.5175574714. The cubic root of 689037172 is about 883.2443823883.

The spelling of 689037172 in words is "six hundred eighty-nine million, thirty-seven thousand, one hundred seventy-two".