697739644 has 24 divisors (see below), whose sum is σ = 1396918880. Its totient is φ = 298722816.

The previous prime is 697739633. The next prime is 697739659. The reversal of 697739644 is 446937796.

It is a super-2 number, since 2×697739644² = 973681221618493472, which contains 22 as substring.

It is a congruent number.

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, 15904 + ... + 40600.

Almost surely, 2^697739644 is an apocalyptic number.

It is an amenable number.

697739644 is an abundant number, since it is smaller than the sum of its proper divisors (699179236).

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

697739644 is a wasteful number, since it uses less digits than its factorization.

697739644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25717 (or 25715 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 55.

The square root of 697739644 is about 26414.7618577189. The cubic root of 697739644 is about 886.9472668600.

The spelling of 697739644 in words is "six hundred ninety-seven million, seven hundred thirty-nine thousand, six hundred forty-four".