697989938 has 32 divisors (see below), whose sum is σ = 1087190832. Its totient is φ = 335923200.

The previous prime is 697989931. The next prime is 697989953. The reversal of 697989938 is 839989796.

It can be written as a sum of positive squares in 8 ways, for example, as 1399489 + 696590449 = 1183^2 + 26393^2 .

It is not an unprimeable number, because it can be changed into a prime (697989931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1611770 + ... + 1612202.

Almost surely, 2^697989938 is an apocalyptic number.

697989938 is a deficient number, since it is larger than the sum of its proper divisors (389200894).

697989938 is a wasteful number, since it uses less digits than its factorization.

697989938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750.

The product of its digits is 52907904, while the sum is 68.

The square root of 697989938 is about 26419.4992004012. The cubic root of 697989938 is about 887.0533097760.

The spelling of 697989938 in words is "six hundred ninety-seven million, nine hundred eighty-nine thousand, nine hundred thirty-eight".