321316799 has 2 divisors, whose sum is σ = 321316800. Its totient is φ = 321316798.

The previous prime is 321316777. The next prime is 321316859. The reversal of 321316799 is 997613123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321316799 - 2¹⁶ = 321251263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321318799) 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 as a sum of consecutive naturals, namely, 160658399 + 160658400.

It is an arithmetic number, because the mean of its divisors is an integer number (160658400).

Almost surely, 2^321316799 is an apocalyptic number.

321316799 is a deficient number, since it is larger than the sum of its proper divisors (1).

321316799 is an equidigital number, since it uses as much as digits as its factorization.

321316799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 41.

The square root of 321316799 is about 17925.3116848773. The cubic root of 321316799 is about 684.9273007898.

The spelling of 321316799 in words is "three hundred twenty-one million, three hundred sixteen thousand, seven hundred ninety-nine".