321664127 has 2 divisors, whose sum is σ = 321664128. Its totient is φ = 321664126.

The previous prime is 321664111. The next prime is 321664139. The reversal of 321664127 is 721466123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321664127 - 2⁴ = 321664111 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 321664093 and 321664102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321664727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160832063 + 160832064.

It is an arithmetic number, because the mean of its divisors is an integer number (160832064).

Almost surely, 2^321664127 is an apocalyptic number.

321664127 is a deficient number, since it is larger than the sum of its proper divisors (1).

321664127 is an equidigital number, since it uses as much as digits as its factorization.

321664127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 321664127 is about 17934.9972679117. The cubic root of 321664127 is about 685.1740030727.

The spelling of 321664127 in words is "three hundred twenty-one million, six hundred sixty-four thousand, one hundred twenty-seven".