326993129 has 2 divisors, whose sum is σ = 326993130. Its totient is φ = 326993128.

The previous prime is 326993119. The next prime is 326993131. The reversal of 326993129 is 921399623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279658729 + 47334400 = 16723^2 + 6880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326993129 is a prime.

It is a Sophie Germain prime.

Together with 326993131, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 326993129.

It is not a weakly prime, because it can be changed into another prime (326993119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163496564 + 163496565.

It is an arithmetic number, because the mean of its divisors is an integer number (163496565).

Almost surely, 2^326993129 is an apocalyptic number.

It is an amenable number.

326993129 is a deficient number, since it is larger than the sum of its proper divisors (1).

326993129 is an equidigital number, since it uses as much as digits as its factorization.

326993129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 44.

The square root of 326993129 is about 18082.9513354430. The cubic root of 326993129 is about 688.9370520157.

The spelling of 326993129 in words is "three hundred twenty-six million, nine hundred ninety-three thousand, one hundred twenty-nine".