321938849 has 2 divisors, whose sum is σ = 321938850. Its totient is φ = 321938848.

The previous prime is 321938783. The next prime is 321938863. The reversal of 321938849 is 948839123.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283585600 + 38353249 = 16840^2 + 6193^2 .

It is an emirp because it is prime and its reverse (948839123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321938849 - 2⁸ = 321938593 is a prime.

It is not a weakly prime, because it can be changed into another prime (321938879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160969424 + 160969425.

It is an arithmetic number, because the mean of its divisors is an integer number (160969425).

Almost surely, 2^321938849 is an apocalyptic number.

It is an amenable number.

321938849 is a deficient number, since it is larger than the sum of its proper divisors (1).

321938849 is an equidigital number, since it uses as much as digits as its factorization.

321938849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 47.

The square root of 321938849 is about 17942.6544580226. The cubic root of 321938849 is about 685.3690085609.

The spelling of 321938849 in words is "three hundred twenty-one million, nine hundred thirty-eight thousand, eight hundred forty-nine".