921422668 has 12 divisors (see below), whose sum is σ = 1615327560. Its totient is φ = 459900512.

The previous prime is 921422617. The next prime is 921422693. The reversal of 921422668 is 866224129.

It is a self number, because there is not a number n which added to its sum of digits gives 921422668.

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, 200146 + ... + 204697.

It is an arithmetic number, because the mean of its divisors is an integer number (134610630).

Almost surely, 2^921422668 is an apocalyptic number.

It is an amenable number.

921422668 is a deficient number, since it is larger than the sum of its proper divisors (693904892).

921422668 is a wasteful number, since it uses less digits than its factorization.

921422668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405416 (or 405414 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 921422668 is about 30354.9447042817. The cubic root of 921422668 is about 973.0898980979.

The spelling of 921422668 in words is "nine hundred twenty-one million, four hundred twenty-two thousand, six hundred sixty-eight".