721799715 has 32 divisors (see below), whose sum is σ = 1421392896. Its totient is φ = 304583040.

The previous prime is 721799713. The next prime is 721799717. The reversal of 721799715 is 517997127.

721799715 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (721799713) and next prime (721799717).

It is not a de Polignac number, because 721799715 - 2¹ = 721799713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (721799713) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 263031 + ... + 265760.

It is an arithmetic number, because the mean of its divisors is an integer number (44418528).

Almost surely, 2^721799715 is an apocalyptic number.

721799715 is a deficient number, since it is larger than the sum of its proper divisors (699593181).

721799715 is a wasteful number, since it uses less digits than its factorization.

721799715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528819.

The product of its digits is 277830, while the sum is 48.

The square root of 721799715 is about 26866.3305086497. The cubic root of 721799715 is about 897.0271104856.

The spelling of 721799715 in words is "seven hundred twenty-one million, seven hundred ninety-nine thousand, seven hundred fifteen".