326905913 has 2 divisors, whose sum is σ = 326905914. Its totient is φ = 326905912.

The previous prime is 326905897. The next prime is 326905921. The reversal of 326905913 is 319509623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314423824 + 12482089 = 17732^2 + 3533^2 .

It is an emirp because it is prime and its reverse (319509623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 326905913 - 2⁴ = 326905897 is a prime.

It is not a weakly prime, because it can be changed into another prime (326905213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163452956 + 163452957.

It is an arithmetic number, because the mean of its divisors is an integer number (163452957).

Almost surely, 2^326905913 is an apocalyptic number.

It is an amenable number.

326905913 is a deficient number, since it is larger than the sum of its proper divisors (1).

326905913 is an equidigital number, since it uses as much as digits as its factorization.

326905913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 326905913 is about 18080.5396213719. The cubic root of 326905913 is about 688.8757951967.

The spelling of 326905913 in words is "three hundred twenty-six million, nine hundred five thousand, nine hundred thirteen".