321313147 has 2 divisors, whose sum is σ = 321313148. Its totient is φ = 321313146.

The previous prime is 321313133. The next prime is 321313159. The reversal of 321313147 is 741313123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321313147 - 2⁷ = 321313019 is a prime.

It is not a weakly prime, because it can be changed into another prime (321313747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160656573 + 160656574.

It is an arithmetic number, because the mean of its divisors is an integer number (160656574).

Almost surely, 2^321313147 is an apocalyptic number.

321313147 is a deficient number, since it is larger than the sum of its proper divisors (1).

321313147 is an equidigital number, since it uses as much as digits as its factorization.

321313147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 321313147 is about 17925.2098174610. The cubic root of 321313147 is about 684.9247058804.

The spelling of 321313147 in words is "three hundred twenty-one million, three hundred thirteen thousand, one hundred forty-seven".