697393937 has 6 divisors (see below), whose sum is σ = 699298614. Its totient is φ = 695494400.

The previous prime is 697393933. The next prime is 697393951. The reversal of 697393937 is 739393796.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 316519681 + 380874256 = 17791^2 + 19516^2 .

It is not a de Polignac number, because 697393937 - 2² = 697393933 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (697393933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158633 + ... + 162969.

It is an arithmetic number, because the mean of its divisors is an integer number (116549769).

Almost surely, 2^697393937 is an apocalyptic number.

It is an amenable number.

697393937 is a deficient number, since it is larger than the sum of its proper divisors (1904677).

697393937 is an frugal number, since it uses more digits than its factorization.

697393937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5139 (or 4738 counting only the distinct ones).

The product of its digits is 5786802, while the sum is 56.

The square root of 697393937 is about 26408.2172249472. The cubic root of 697393937 is about 886.8007582800.

The spelling of 697393937 in words is "six hundred ninety-seven million, three hundred ninety-three thousand, nine hundred thirty-seven".