321613217057389 has 2 divisors, whose sum is σ = 321613217057390. Its totient is φ = 321613217057388.

The previous prime is 321613217057347. The next prime is 321613217057423. The reversal of 321613217057389 is 983750712316123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279284426358025 + 42328790699364 = 16711805^2 + 6506058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321613217057389 is a prime.

It is a super-2 number, since 2×321613217057389² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321613217057789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160806608528694 + 160806608528695.

It is an arithmetic number, because the mean of its divisors is an integer number (160806608528695).

Almost surely, 2^{321613217057389} is an apocalyptic number.

It is an amenable number.

321613217057389 is a deficient number, since it is larger than the sum of its proper divisors (1).

321613217057389 is an equidigital number, since it uses as much as digits as its factorization.

321613217057389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 321613217057389 in words is "three hundred twenty-one trillion, six hundred thirteen billion, two hundred seventeen million, fifty-seven thousand, three hundred eighty-nine".