921138674 has 32 divisors (see below), whose sum is σ = 1432502064. Its totient is φ = 444026880.

The previous prime is 921138671. The next prime is 921138703. The reversal of 921138674 is 476831129.

It can be written as a sum of positive squares in 8 ways, for example, as 424071649 + 497067025 = 20593^2 + 22295^2 .

It is not an unprimeable number, because it can be changed into a prime (921138671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2609282 + ... + 2609634.

Almost surely, 2^921138674 is an apocalyptic number.

921138674 is a deficient number, since it is larger than the sum of its proper divisors (511363390).

921138674 is a wasteful number, since it uses less digits than its factorization.

921138674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782.

The product of its digits is 72576, while the sum is 41.

The square root of 921138674 is about 30350.2664568204. The cubic root of 921138674 is about 972.9899149961.

The spelling of 921138674 in words is "nine hundred twenty-one million, one hundred thirty-eight thousand, six hundred seventy-four".