691713072 has 30 divisors (see below), whose sum is σ = 1935836292. Its totient is φ = 230570976.

The previous prime is 691713041. The next prime is 691713089. The reversal of 691713072 is 270317196.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 5 ways as a sum of consecutive naturals, for example, 2401638 + ... + 2401925.

Almost surely, 2^691713072 is an apocalyptic number.

It is an amenable number.

691713072 is an abundant number, since it is smaller than the sum of its proper divisors (1244123220).

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

691713072 is a wasteful number, since it uses less digits than its factorization.

691713072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4803577 (or 4803568 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 691713072 is about 26300.4386275210. The cubic root of 691713072 is about 884.3862756361.

The spelling of 691713072 in words is "six hundred ninety-one million, seven hundred thirteen thousand, seventy-two".