321320402539 has 2 divisors, whose sum is σ = 321320402540. Its totient is φ = 321320402538.

The previous prime is 321320402531. The next prime is 321320402569. The reversal of 321320402539 is 935204023123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321320402539 - 2³ = 321320402531 is a prime.

It is not a weakly prime, because it can be changed into another prime (321320402531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160660201269 + 160660201270.

It is an arithmetic number, because the mean of its divisors is an integer number (160660201270).

Almost surely, 2^321320402539 is an apocalyptic number.

321320402539 is a deficient number, since it is larger than the sum of its proper divisors (1).

321320402539 is an equidigital number, since it uses as much as digits as its factorization.

321320402539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 321320402539 in words is "three hundred twenty-one billion, three hundred twenty million, four hundred two thousand, five hundred thirty-nine".