13601909 has 2 divisors, whose sum is σ = 13601910. Its totient is φ = 13601908.

The previous prime is 13601897. The next prime is 13601911. The reversal of 13601909 is 90910631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13118884 + 483025 = 3622^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 13601909 - 2⁴ = 13601893 is a prime.

Together with 13601911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13601999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6800954 + 6800955.

It is an arithmetic number, because the mean of its divisors is an integer number (6800955).

Almost surely, 2^13601909 is an apocalyptic number.

It is an amenable number.

13601909 is a deficient number, since it is larger than the sum of its proper divisors (1).

13601909 is an equidigital number, since it uses as much as digits as its factorization.

13601909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 13601909 is about 3688.0765989876. The cubic root of 13601909 is about 238.7078062914.

The spelling of 13601909 in words is "thirteen million, six hundred one thousand, nine hundred nine".