721994970 has 16 divisors (see below), whose sum is σ = 1732788000. Its totient is φ = 192531984.

The previous prime is 721994969. The next prime is 721994989. The reversal of 721994970 is 79499127.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 12033220 + ... + 12033279.

It is an arithmetic number, because the mean of its divisors is an integer number (108299250).

Almost surely, 2^721994970 is an apocalyptic number.

721994970 is an abundant number, since it is smaller than the sum of its proper divisors (1010793030).

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

721994970 is a wasteful number, since it uses less digits than its factorization.

721994970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24066509.

The product of its (nonzero) digits is 285768, while the sum is 48.

The square root of 721994970 is about 26869.9640863176. The cubic root of 721994970 is about 897.1079885251.

The spelling of 721994970 in words is "seven hundred twenty-one million, nine hundred ninety-four thousand, nine hundred seventy".