321318859 has 2 divisors, whose sum is σ = 321318860. Its totient is φ = 321318858.

The previous prime is 321318857. The next prime is 321318863. The reversal of 321318859 is 958813123.

It is a weak prime.

It is an emirp because it is prime and its reverse (958813123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321318859 - 2¹ = 321318857 is a prime.

Together with 321318857, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (321318857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160659429 + 160659430.

It is an arithmetic number, because the mean of its divisors is an integer number (160659430).

Almost surely, 2^321318859 is an apocalyptic number.

321318859 is a deficient number, since it is larger than the sum of its proper divisors (1).

321318859 is an equidigital number, since it uses as much as digits as its factorization.

321318859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 321318859 is about 17925.3691454318. The cubic root of 321318859 is about 684.9287645034.

The spelling of 321318859 in words is "three hundred twenty-one million, three hundred eighteen thousand, eight hundred fifty-nine".