721792972 has 12 divisors (see below), whose sum is σ = 1263325896. Its totient is φ = 360842720.

The previous prime is 721792949. The next prime is 721792979. The reversal of 721792972 is 279297127.

It is not an unprimeable number, because it can be changed into a prime (721792979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44847 + ... + 58777.

It is an arithmetic number, because the mean of its divisors is an integer number (105277158).

Almost surely, 2^721792972 is an apocalyptic number.

It is an amenable number.

721792972 is a deficient number, since it is larger than the sum of its proper divisors (541532924).

721792972 is a wasteful number, since it uses less digits than its factorization.

721792972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26888 (or 26886 counting only the distinct ones).

The product of its digits is 222264, while the sum is 46.

The square root of 721792972 is about 26866.2050167120. The cubic root of 721792972 is about 897.0243171564.

The spelling of 721792972 in words is "seven hundred twenty-one million, seven hundred ninety-two thousand, nine hundred seventy-two".