321613394093 has 2 divisors, whose sum is σ = 321613394094. Its totient is φ = 321613394092.

The previous prime is 321613394083. The next prime is 321613394107. The reversal of 321613394093 is 390493316123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 303092089444 + 18521304649 = 550538^2 + 136093^2 .

It is an emirp because it is prime and its reverse (390493316123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321613394093 - 2⁸ = 321613393837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321613394083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160806697046 + 160806697047.

It is an arithmetic number, because the mean of its divisors is an integer number (160806697047).

Almost surely, 2^321613394093 is an apocalyptic number.

It is an amenable number.

321613394093 is a deficient number, since it is larger than the sum of its proper divisors (1).

321613394093 is an equidigital number, since it uses as much as digits as its factorization.

321613394093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 44.

The spelling of 321613394093 in words is "three hundred twenty-one billion, six hundred thirteen million, three hundred ninety-four thousand, ninety-three".