13325947409 has 2 divisors, whose sum is σ = 13325947410. Its totient is φ = 13325947408.

The previous prime is 13325947399. The next prime is 13325947433. The reversal of 13325947409 is 90474952331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13310698384 + 15249025 = 115372^2 + 3905^2 .

It is a cyclic number.

It is not a de Polignac number, because 13325947409 - 2²⁰ = 13324898833 is a prime.

It is not a weakly prime, because it can be changed into another prime (13325947489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6662973704 + 6662973705.

It is an arithmetic number, because the mean of its divisors is an integer number (6662973705).

Almost surely, 2^13325947409 is an apocalyptic number.

It is an amenable number.

13325947409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13325947409 is an equidigital number, since it uses as much as digits as its factorization.

13325947409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 13325947409 in words is "thirteen billion, three hundred twenty-five million, nine hundred forty-seven thousand, four hundred nine".