721365363 has 6 divisors (see below), whose sum is σ = 1041972204. Its totient is φ = 480910236.

The previous prime is 721365317. The next prime is 721365371. The reversal of 721365363 is 363563127.

It is not a de Polignac number, because 721365363 - 2⁶ = 721365299 is a prime.

It is a super-2 number, since 2×721365363² = 1040735973872243538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (721365313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40075845 + ... + 40075862.

It is an arithmetic number, because the mean of its divisors is an integer number (173662034).

Almost surely, 2^721365363 is an apocalyptic number.

721365363 is a deficient number, since it is larger than the sum of its proper divisors (320606841).

721365363 is a wasteful number, since it uses less digits than its factorization.

721365363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80151713 (or 80151710 counting only the distinct ones).

The product of its digits is 68040, while the sum is 36.

The square root of 721365363 is about 26858.2457170978. The cubic root of 721365363 is about 896.8471419562.

The spelling of 721365363 in words is "seven hundred twenty-one million, three hundred sixty-five thousand, three hundred sixty-three".