321671113 has 2 divisors, whose sum is σ = 321671114. Its totient is φ = 321671112.

The previous prime is 321671057. The next prime is 321671143. The reversal of 321671113 is 311176123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190522809 + 131148304 = 13803^2 + 11452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321671113 is a prime.

It is not a weakly prime, because it can be changed into another prime (321671143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160835556 + 160835557.

It is an arithmetic number, because the mean of its divisors is an integer number (160835557).

Almost surely, 2^321671113 is an apocalyptic number.

It is an amenable number.

321671113 is a deficient number, since it is larger than the sum of its proper divisors (1).

321671113 is an equidigital number, since it uses as much as digits as its factorization.

321671113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 25.

The square root of 321671113 is about 17935.1920257353. The cubic root of 321671113 is about 685.1789633097.

The spelling of 321671113 in words is "three hundred twenty-one million, six hundred seventy-one thousand, one hundred thirteen".