709697664 has 96 divisors (see below), whose sum is σ = 2199369900. Its totient is φ = 218363904.

The previous prime is 709697647. The next prime is 709697669. The reversal of 709697664 is 466796907.

It can be written as a sum of positive squares in 2 ways, for example, as 538611264 + 171086400 = 23208^2 + 13080^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 709697664.

It is not an unprimeable number, because it can be changed into a prime (709697669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8719 + ... + 38670.

Almost surely, 2^709697664 is an apocalyptic number.

It is an amenable number.

709697664 is an abundant number, since it is smaller than the sum of its proper divisors (1489672236).

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

709697664 is a wasteful number, since it uses less digits than its factorization.

709697664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47422 (or 47407 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The square root of 709697664 is about 26640.1513509214. The cubic root of 709697664 is about 891.9854944788.

The spelling of 709697664 in words is "seven hundred nine million, six hundred ninety-seven thousand, six hundred sixty-four".