697705631 has 8 divisors (see below), whose sum is σ = 839345280. Its totient is φ = 566557848.

The previous prime is 697705627. The next prime is 697705637. The reversal of 697705631 is 136507796.

697705631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 697705631 - 2² = 697705627 is a prime.

It is a super-2 number, since 2×697705631² = 973586295058216322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697705637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2622821 + ... + 2623086.

It is an arithmetic number, because the mean of its divisors is an integer number (104918160).

Almost surely, 2^697705631 is an apocalyptic number.

697705631 is a deficient number, since it is larger than the sum of its proper divisors (141639649).

697705631 is a wasteful number, since it uses less digits than its factorization.

697705631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245933.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 697705631 is about 26414.1180242688. The cubic root of 697705631 is about 886.9328544986.

The spelling of 697705631 in words is "six hundred ninety-seven million, seven hundred five thousand, six hundred thirty-one".