326688613 has 2 divisors, whose sum is σ = 326688614. Its totient is φ = 326688612.

The previous prime is 326688563. The next prime is 326688653. The reversal of 326688613 is 316886623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 324792484 + 1896129 = 18022^2 + 1377^2 .

It is an emirp because it is prime and its reverse (316886623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 326688613 - 2¹³ = 326680421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 326688613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326688653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163344306 + 163344307.

It is an arithmetic number, because the mean of its divisors is an integer number (163344307).

Almost surely, 2^326688613 is an apocalyptic number.

It is an amenable number.

326688613 is a deficient number, since it is larger than the sum of its proper divisors (1).

326688613 is an equidigital number, since it uses as much as digits as its factorization.

326688613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 326688613 is about 18074.5293991296. The cubic root of 326688613 is about 688.7231254892.

The spelling of 326688613 in words is "three hundred twenty-six million, six hundred eighty-eight thousand, six hundred thirteen".