321200072693 has 2 divisors, whose sum is σ = 321200072694. Its totient is φ = 321200072692.

The previous prime is 321200072629. The next prime is 321200072701. The reversal of 321200072693 is 396270002123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267994653124 + 53205419569 = 517682^2 + 230663^2 .

It is a cyclic number.

It is not a de Polignac number, because 321200072693 - 2⁶ = 321200072629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321200074693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160600036346 + 160600036347.

It is an arithmetic number, because the mean of its divisors is an integer number (160600036347).

Almost surely, 2^321200072693 is an apocalyptic number.

It is an amenable number.

321200072693 is a deficient number, since it is larger than the sum of its proper divisors (1).

321200072693 is an equidigital number, since it uses as much as digits as its factorization.

321200072693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The spelling of 321200072693 in words is "three hundred twenty-one billion, two hundred million, seventy-two thousand, six hundred ninety-three".