921493538 has 16 divisors (see below), whose sum is σ = 1630662144. Its totient is φ = 382186080.

The previous prime is 921493519. The next prime is 921493541. The reversal of 921493538 is 835394129.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1061195 + ... + 1062062.

It is an arithmetic number, because the mean of its divisors is an integer number (101916384).

Almost surely, 2^921493538 is an apocalyptic number.

921493538 is a deficient number, since it is larger than the sum of its proper divisors (709168606).

921493538 is a wasteful number, since it uses less digits than its factorization.

921493538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123297.

The product of its digits is 233280, while the sum is 44.

The square root of 921493538 is about 30356.1120369523. The cubic root of 921493538 is about 973.1148454304.

The spelling of 921493538 in words is "nine hundred twenty-one million, four hundred ninety-three thousand, five hundred thirty-eight".