721382373 has 24 divisors (see below), whose sum is σ = 1090332672. Its totient is φ = 458729568.

The previous prime is 721382353. The next prime is 721382381. The reversal of 721382373 is 373283127.

It is not a de Polignac number, because 721382373 - 2²⁹ = 184511461 is a prime.

It is a super-2 number, since 2×721382373² = 1040785056150222258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721382353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72540 + ... + 81882.

It is an arithmetic number, because the mean of its divisors is an integer number (45430528).

Almost surely, 2^721382373 is an apocalyptic number.

It is an amenable number.

721382373 is a deficient number, since it is larger than the sum of its proper divisors (368950299).

721382373 is a wasteful number, since it uses less digits than its factorization.

721382373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9745 (or 9742 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 721382373 is about 26858.5623777595. The cubic root of 721382373 is about 896.8541912042.

The spelling of 721382373 in words is "seven hundred twenty-one million, three hundred eighty-two thousand, three hundred seventy-three".