691922156 has 24 divisors (see below), whose sum is σ = 1290401280. Its totient is φ = 323876432.

The previous prime is 691922149. The next prime is 691922167. The reversal of 691922156 is 651229196.

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 in 7 ways as a sum of consecutive naturals, for example, 75686 + ... + 84333.

It is an arithmetic number, because the mean of its divisors is an integer number (53766720).

Almost surely, 2^691922156 is an apocalyptic number.

It is an amenable number.

691922156 is a deficient number, since it is larger than the sum of its proper divisors (598479124).

691922156 is a wasteful number, since it uses less digits than its factorization.

691922156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160093 (or 160091 counting only the distinct ones).

The product of its digits is 58320, while the sum is 41.

The square root of 691922156 is about 26304.4132418878. The cubic root of 691922156 is about 884.4753744256.

The spelling of 691922156 in words is "six hundred ninety-one million, nine hundred twenty-two thousand, one hundred fifty-six".