697688 has 8 divisors (see below), whose sum is σ = 1308180. Its totient is φ = 348840.

The previous prime is 697687. The next prime is 697691. The reversal of 697688 is 886796.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43598 + ... + 43613.

2⁶⁹⁷⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

697688 is a deficient number, since it is larger than the sum of its proper divisors (610492).

697688 is a wasteful number, since it uses less digits than its factorization.

697688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87217 (or 87213 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 697688 is about 835.2771994973. The cubic root of 697688 is about 88.6925383514.

The spelling of 697688 in words is "six hundred ninety-seven thousand, six hundred eighty-eight".