691912892 has 48 divisors (see below), whose sum is σ = 1410151680. Its totient is φ = 293731200.

The previous prime is 691912877. The next prime is 691912909. The reversal of 691912892 is 298219196.

691912892 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53528 + ... + 65184.

It is an arithmetic number, because the mean of its divisors is an integer number (29378160).

Almost surely, 2^691912892 is an apocalyptic number.

It is an amenable number.

691912892 is an abundant number, since it is smaller than the sum of its proper divisors (718238788).

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

691912892 is a wasteful number, since it uses less digits than its factorization.

691912892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11762 (or 11760 counting only the distinct ones).

The product of its digits is 139968, while the sum is 47.

The square root of 691912892 is about 26304.2371491743. The cubic root of 691912892 is about 884.4714270565.

The spelling of 691912892 in words is "six hundred ninety-one million, nine hundred twelve thousand, eight hundred ninety-two".