321938977 has 2 divisors, whose sum is σ = 321938978. Its totient is φ = 321938976.

The previous prime is 321938941. The next prime is 321938993. The reversal of 321938977 is 779839123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318408336 + 3530641 = 17844^2 + 1879^2 .

It is a cyclic number.

It is not a de Polignac number, because 321938977 - 2⁷ = 321938849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321938977.

It is not a weakly prime, because it can be changed into another prime (321938917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160969488 + 160969489.

It is an arithmetic number, because the mean of its divisors is an integer number (160969489).

Almost surely, 2^321938977 is an apocalyptic number.

It is an amenable number.

321938977 is a deficient number, since it is larger than the sum of its proper divisors (1).

321938977 is an equidigital number, since it uses as much as digits as its factorization.

321938977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 49.

The square root of 321938977 is about 17942.6580249416. The cubic root of 321938977 is about 685.3690993930.

The spelling of 321938977 in words is "three hundred twenty-one million, nine hundred thirty-eight thousand, nine hundred seventy-seven".