321319963 has 6 divisors (see below), whose sum is σ = 339122004. Its totient is φ = 304408044.

The previous prime is 321319961. The next prime is 321319981. The reversal of 321319963 is 369913123.

It is not a de Polignac number, because 321319963 - 2¹ = 321319961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321319961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 444681 + ... + 445402.

It is an arithmetic number, because the mean of its divisors is an integer number (56520334).

Almost surely, 2^321319963 is an apocalyptic number.

321319963 is a deficient number, since it is larger than the sum of its proper divisors (17802041).

321319963 is an equidigital number, since it uses as much as digits as its factorization.

321319963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890121 (or 890102 counting only the distinct ones).

The product of its digits is 26244, while the sum is 37.

The square root of 321319963 is about 17925.3999397503. The cubic root of 321319963 is about 684.9295489375.

The spelling of 321319963 in words is "three hundred twenty-one million, three hundred nineteen thousand, nine hundred sixty-three".