693697538 has 16 divisors (see below), whose sum is σ = 1057470360. Its totient is φ = 341231616.

The previous prime is 693697513. The next prime is 693697541. The reversal of 693697538 is 835796396.

It can be written as a sum of positive squares in 4 ways, for example, as 667860649 + 25836889 = 25843^2 + 5083^2 .

It is a super-2 number, since 2×693697538² = 962432548454522888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53906 + ... + 65522.

Almost surely, 2^693697538 is an apocalyptic number.

693697538 is a deficient number, since it is larger than the sum of its proper divisors (363772822).

693697538 is a wasteful number, since it uses less digits than its factorization.

693697538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12101.

The product of its digits is 7348320, while the sum is 56.

The square root of 693697538 is about 26338.1384687681. The cubic root of 693697538 is about 885.2312111484.

The spelling of 693697538 in words is "six hundred ninety-three million, six hundred ninety-seven thousand, five hundred thirty-eight".