697808 has 10 divisors (see below), whose sum is σ = 1352034. Its totient is φ = 348896.

The previous prime is 697787. The next prime is 697819. The reversal of 697808 is 808796.

It can be written as a sum of positive squares in only one way, i.e., 652864 + 44944 = 808^2 + 212^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697808.

It is an unprimeable number.

697808 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21791 + ... + 21822.

2⁶⁹⁷⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

697808 is a deficient number, since it is larger than the sum of its proper divisors (654226).

697808 is a wasteful number, since it uses less digits than its factorization.

697808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43621 (or 43615 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 697808 is about 835.3490288496. The cubic root of 697808 is about 88.6976229997.

The spelling of 697808 in words is "six hundred ninety-seven thousand, eight hundred eight".