721016992 has 12 divisors (see below), whose sum is σ = 1419502266. Its totient is φ = 360508480.

The previous prime is 721016987. The next prime is 721017001. The reversal of 721016992 is 299610127.

721016992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 411116176 + 309900816 = 20276^2 + 17604^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11265859 + ... + 11265922.

Almost surely, 2^721016992 is an apocalyptic number.

It is an amenable number.

721016992 is a deficient number, since it is larger than the sum of its proper divisors (698485274).

721016992 is a wasteful number, since it uses less digits than its factorization.

721016992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22531791 (or 22531783 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 721016992 is about 26851.7595699053. The cubic root of 721016992 is about 896.7027464066.

The spelling of 721016992 in words is "seven hundred twenty-one million, sixteen thousand, nine hundred ninety-two".