13609873 has 2 divisors, whose sum is σ = 13609874. Its totient is φ = 13609872.

The previous prime is 13609853. The next prime is 13609889. The reversal of 13609873 is 37890631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10810944 + 2798929 = 3288^2 + 1673^2 .

It is a cyclic number.

It is not a de Polignac number, because 13609873 - 2⁹ = 13609361 is a prime.

It is a super-2 number, since 2×13609873² = 370457286152258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13609853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6804936 + 6804937.

It is an arithmetic number, because the mean of its divisors is an integer number (6804937).

Almost surely, 2^13609873 is an apocalyptic number.

It is an amenable number.

13609873 is a deficient number, since it is larger than the sum of its proper divisors (1).

13609873 is an equidigital number, since it uses as much as digits as its factorization.

13609873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 13609873 is about 3689.1561365711. The cubic root of 13609873 is about 238.7543854900.

The spelling of 13609873 in words is "thirteen million, six hundred nine thousand, eight hundred seventy-three".