326070721 has 2 divisors, whose sum is σ = 326070722. Its totient is φ = 326070720.

The previous prime is 326070713. The next prime is 326070733. The reversal of 326070721 is 127070623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324000000 + 2070721 = 18000^2 + 1439^2 .

It is an emirp because it is prime and its reverse (127070623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 326070721 - 2³ = 326070713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 326070721.

It is not a weakly prime, because it can be changed into another prime (326070821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163035360 + 163035361.

It is an arithmetic number, because the mean of its divisors is an integer number (163035361).

Almost surely, 2^326070721 is an apocalyptic number.

It is an amenable number.

326070721 is a deficient number, since it is larger than the sum of its proper divisors (1).

326070721 is an equidigital number, since it uses as much as digits as its factorization.

326070721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 326070721 is about 18057.4284160287. The cubic root of 326070721 is about 688.2886392833.

The spelling of 326070721 in words is "three hundred twenty-six million, seventy thousand, seven hundred twenty-one".