697606388 has 6 divisors (see below), whose sum is σ = 1220811186. Its totient is φ = 348803192.

The previous prime is 697606379. The next prime is 697606433. The reversal of 697606388 is 883606796.

It can be written as a sum of positive squares in only one way, i.e., 657512164 + 40094224 = 25642^2 + 6332^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 87200795 + ... + 87200802.

It is an arithmetic number, because the mean of its divisors is an integer number (203468531).

Almost surely, 2^697606388 is an apocalyptic number.

It is an amenable number.

697606388 is a deficient number, since it is larger than the sum of its proper divisors (523204798).

697606388 is a wasteful number, since it uses less digits than its factorization.

697606388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174401601 (or 174401599 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 53.

The square root of 697606388 is about 26412.2393598120. The cubic root of 697606388 is about 886.8907994890.

The spelling of 697606388 in words is "six hundred ninety-seven million, six hundred six thousand, three hundred eighty-eight".