721938716 has 6 divisors (see below), whose sum is σ = 1263392760. Its totient is φ = 360969356.

The previous prime is 721938713. The next prime is 721938727. The reversal of 721938716 is 617839127.

721938716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721938713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90242336 + ... + 90242343.

It is an arithmetic number, because the mean of its divisors is an integer number (210565460).

Almost surely, 2^721938716 is an apocalyptic number.

It is an amenable number.

721938716 is a deficient number, since it is larger than the sum of its proper divisors (541454044).

721938716 is a wasteful number, since it uses less digits than its factorization.

721938716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180484683 (or 180484681 counting only the distinct ones).

The product of its digits is 127008, while the sum is 44.

The square root of 721938716 is about 26868.9172837314. The cubic root of 721938716 is about 897.0846886289.

The spelling of 721938716 in words is "seven hundred twenty-one million, nine hundred thirty-eight thousand, seven hundred sixteen".