689192664 has 32 divisors (see below), whose sum is σ = 1726307520. Its totient is φ = 229287456.

The previous prime is 689192659. The next prime is 689192689. The reversal of 689192664 is 466291986.

It is a super-2 number, since 2×689192664² = 949973056222833792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14902 + ... + 40005.

It is an arithmetic number, because the mean of its divisors is an integer number (53947110).

Almost surely, 2^689192664 is an apocalyptic number.

It is an amenable number.

689192664 is an abundant number, since it is smaller than the sum of its proper divisors (1037114856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689192664 is a wasteful number, since it uses less digits than its factorization.

689192664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55439 (or 55435 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The square root of 689192664 is about 26252.4791972111. The cubic root of 689192664 is about 883.3108166880.

The spelling of 689192664 in words is "six hundred eighty-nine million, one hundred ninety-two thousand, six hundred sixty-four".