693974538 has 24 divisors (see below), whose sum is σ = 1568986848. Its totient is φ = 221267112.

The previous prime is 693974521. The next prime is 693974623. The reversal of 693974538 is 835479396.

693974538 is a `hidden beast` number, since 6 + 9 + 39 + 74 + 538 = 666.

It is a super-4 number, since 4×693974538⁴ (a number of 36 digits) contains 4444 as substring.

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, 837720 + ... + 838547.

It is an arithmetic number, because the mean of its divisors is an integer number (65374452).

Almost surely, 2^693974538 is an apocalyptic number.

693974538 is an abundant number, since it is smaller than the sum of its proper divisors (875012310).

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

693974538 is a wasteful number, since it uses less digits than its factorization.

693974538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676298 (or 1676295 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 693974538 is about 26343.3964780550. The cubic root of 693974538 is about 885.3490225389.

The spelling of 693974538 in words is "six hundred ninety-three million, nine hundred seventy-four thousand, five hundred thirty-eight".