321871323973 has 2 divisors, whose sum is σ = 321871323974. Its totient is φ = 321871323972.

The previous prime is 321871323869. The next prime is 321871323989. The reversal of 321871323973 is 379323178123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319142515329 + 2728808644 = 564927^2 + 52238^2 .

It is an emirp because it is prime and its reverse (379323178123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321871323973 - 2²¹ = 321869226821 is a prime.

It is a super-2 number, since 2×321871323973² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321871383973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160935661986 + 160935661987.

It is an arithmetic number, because the mean of its divisors is an integer number (160935661987).

Almost surely, 2^321871323973 is an apocalyptic number.

It is an amenable number.

321871323973 is a deficient number, since it is larger than the sum of its proper divisors (1).

321871323973 is an equidigital number, since it uses as much as digits as its factorization.

321871323973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 49.

The spelling of 321871323973 in words is "three hundred twenty-one billion, eight hundred seventy-one million, three hundred twenty-three thousand, nine hundred seventy-three".