321309697 has 2 divisors, whose sum is σ = 321309698. Its totient is φ = 321309696.

The previous prime is 321309679. The next prime is 321309713. The reversal of 321309697 is 796903123.

Together with previous prime (321309679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 321162241 + 147456 = 17921^2 + 384^2 .

It is a cyclic number.

It is not a de Polignac number, because 321309697 - 2²⁷ = 187091969 is a prime.

It is not a weakly prime, because it can be changed into another prime (321306697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160654848 + 160654849.

It is an arithmetic number, because the mean of its divisors is an integer number (160654849).

Almost surely, 2^321309697 is an apocalyptic number.

It is an amenable number.

321309697 is a deficient number, since it is larger than the sum of its proper divisors (1).

321309697 is an equidigital number, since it uses as much as digits as its factorization.

321309697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 321309697 is about 17925.1135840195. The cubic root of 321309697 is about 684.9222544830.

The spelling of 321309697 in words is "three hundred twenty-one million, three hundred nine thousand, six hundred ninety-seven".