609694864 has 15 divisors (see below), whose sum is σ = 1181475193. Its totient is φ = 304798048.

The previous prime is 609694859. The next prime is 609694873. The reversal of 609694864 is 468496906.

The square root of 609694864 is 24692.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4928400 + 604766464 = 2220^2 + 24592^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 95682 + ... + 101854.

Almost surely, 2^609694864 is an apocalyptic number.

609694864 is the 24692-nd square number.

It is an amenable number.

609694864 is a deficient number, since it is larger than the sum of its proper divisors (571780329).

609694864 is an frugal number, since it uses more digits than its factorization.

609694864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12354 (or 6175 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 52.

The cubic root of 609694864 is about 847.9511734673.

The spelling of 609694864 in words is "six hundred nine million, six hundred ninety-four thousand, eight hundred sixty-four".