691692684 has 12 divisors (see below), whose sum is σ = 1613949624. Its totient is φ = 230564224.

The previous prime is 691692679. The next prime is 691692691. The reversal of 691692684 is 486296196.

It is a tau number, because it is divible by the number of its divisors (12).

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 in 3 ways as a sum of consecutive naturals, for example, 28820517 + ... + 28820540.

It is an arithmetic number, because the mean of its divisors is an integer number (134495802).

Almost surely, 2^691692684 is an apocalyptic number.

It is an amenable number.

691692684 is an abundant number, since it is smaller than the sum of its proper divisors (922256940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691692684 is a wasteful number, since it uses less digits than its factorization.

691692684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57641064 (or 57641062 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The square root of 691692684 is about 26300.0510265665. The cubic root of 691692684 is about 884.3775865590.

The spelling of 691692684 in words is "six hundred ninety-one million, six hundred ninety-two thousand, six hundred eighty-four".