321309983 has 2 divisors, whose sum is σ = 321309984. Its totient is φ = 321309982.

The previous prime is 321309949. The next prime is 321310019. The reversal of 321309983 is 389903123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321309983 - 2⁸ = 321309727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321309943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160654991 + 160654992.

It is an arithmetic number, because the mean of its divisors is an integer number (160654992).

Almost surely, 2^321309983 is an apocalyptic number.

321309983 is a deficient number, since it is larger than the sum of its proper divisors (1).

321309983 is an equidigital number, since it uses as much as digits as its factorization.

321309983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 321309983 is about 17925.1215616520. The cubic root of 321309983 is about 684.9224577009.

The spelling of 321309983 in words is "three hundred twenty-one million, three hundred nine thousand, nine hundred eighty-three".