921296664 has 48 divisors (see below), whose sum is σ = 2536095120. Its totient is φ = 302063040.

The previous prime is 921296659. The next prime is 921296683. The reversal of 921296664 is 466692129.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100492 + ... + 109275.

It is an arithmetic number, because the mean of its divisors is an integer number (52835315).

Almost surely, 2^921296664 is an apocalyptic number.

It is an amenable number.

921296664 is an abundant number, since it is smaller than the sum of its proper divisors (1614798456).

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

921296664 is a wasteful number, since it uses less digits than its factorization.

921296664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209840 (or 209833 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 921296664 is about 30352.8691230335. The cubic root of 921296664 is about 973.0455395882.

The spelling of 921296664 in words is "nine hundred twenty-one million, two hundred ninety-six thousand, six hundred sixty-four".