788318321 has 12 divisors (see below), whose sum is σ = 926482788. Its totient is φ = 668731392.

The previous prime is 788318309. The next prime is 788318347. The reversal of 788318321 is 123813887.

It can be written as a sum of positive squares in 2 ways, for example, as 133726096 + 654592225 = 11564^2 + 25585^2 .

It is not a de Polignac number, because 788318321 - 2⁶ = 788318257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (788318351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78176 + ... + 87681.

It is an arithmetic number, because the mean of its divisors is an integer number (77206899).

Almost surely, 2^788318321 is an apocalyptic number.

It is an amenable number.

788318321 is a deficient number, since it is larger than the sum of its proper divisors (138164467).

788318321 is a wasteful number, since it uses less digits than its factorization.

788318321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165968 (or 165961 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 788318321 is about 28077.0069808019. The cubic root of 788318321 is about 923.7771309743. Note that the first 3 decimals are identical.

The spelling of 788318321 in words is "seven hundred eighty-eight million, three hundred eighteen thousand, three hundred twenty-one".