691912112 has 10 divisors (see below), whose sum is σ = 1340579748. Its totient is φ = 345956048.

The previous prime is 691912093. The next prime is 691912127. The reversal of 691912112 is 211219196.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21622238 + ... + 21622269.

Almost surely, 2^691912112 is an apocalyptic number.

It is an amenable number.

691912112 is a deficient number, since it is larger than the sum of its proper divisors (648667636).

691912112 is a wasteful number, since it uses less digits than its factorization.

691912112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43244515 (or 43244509 counting only the distinct ones).

The product of its digits is 1944, while the sum is 32.

The square root of 691912112 is about 26304.2223226614. Note that the first 3 decimals coincide. The cubic root of 691912112 is about 884.4710946987.

The spelling of 691912112 in words is "six hundred ninety-one million, nine hundred twelve thousand, one hundred twelve".