321020983 has 2 divisors, whose sum is σ = 321020984. Its totient is φ = 321020982.

The previous prime is 321020971. The next prime is 321020993. The reversal of 321020983 is 389020123.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321020983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321020933) 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 as a sum of consecutive naturals, namely, 160510491 + 160510492.

It is an arithmetic number, because the mean of its divisors is an integer number (160510492).

Almost surely, 2^321020983 is an apocalyptic number.

321020983 is a deficient number, since it is larger than the sum of its proper divisors (1).

321020983 is an equidigital number, since it uses as much as digits as its factorization.

321020983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 321020983 is about 17917.0584360268. The cubic root of 321020983 is about 684.7170465440.

It can be divided in two parts, 321020 and 983, that added together give a triangular number (322003 = T₈₀₂).

The spelling of 321020983 in words is "three hundred twenty-one million, twenty thousand, nine hundred eighty-three".