13312129 has 2 divisors, whose sum is σ = 13312130. Its totient is φ = 13312128.

The previous prime is 13312109. The next prime is 13312133. The reversal of 13312129 is 92121331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13307904 + 4225 = 3648^2 + 65^2 .

It is an emirp because it is prime and its reverse (92121331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13312129 - 2⁷ = 13312001 is a prime.

It is not a weakly prime, because it can be changed into another prime (13312109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656064 + 6656065.

It is an arithmetic number, because the mean of its divisors is an integer number (6656065).

Almost surely, 2^13312129 is an apocalyptic number.

It is an amenable number.

13312129 is a deficient number, since it is larger than the sum of its proper divisors (1).

13312129 is an equidigital number, since it uses as much as digits as its factorization.

13312129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 22.

The square root of 13312129 is about 3648.5790384751. The cubic root of 13312129 is about 237.0004510190. Note that the first 3 decimals are identical.

The spelling of 13312129 in words is "thirteen million, three hundred twelve thousand, one hundred twenty-nine".