326564731 has 2 divisors, whose sum is σ = 326564732. Its totient is φ = 326564730.

The previous prime is 326564699. The next prime is 326564743. The reversal of 326564731 is 137465623.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 326564731 - 2⁵ = 326564699 is a prime.

It is a super-2 number, since 2×326564731² = 213289047066204722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (326514731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163282365 + 163282366.

It is an arithmetic number, because the mean of its divisors is an integer number (163282366).

Almost surely, 2^326564731 is an apocalyptic number.

326564731 is a deficient number, since it is larger than the sum of its proper divisors (1).

326564731 is an equidigital number, since it uses as much as digits as its factorization.

326564731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 37.

The square root of 326564731 is about 18071.1020969945. The cubic root of 326564731 is about 688.6360587007.

The spelling of 326564731 in words is "three hundred twenty-six million, five hundred sixty-four thousand, seven hundred thirty-one".