13611613 has 2 divisors, whose sum is σ = 13611614. Its totient is φ = 13611612.

The previous prime is 13611599. The next prime is 13611659. The reversal of 13611613 is 31611631.

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., 11108889 + 2502724 = 3333^2 + 1582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13611613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13611673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6805806 + 6805807.

It is an arithmetic number, because the mean of its divisors is an integer number (6805807).

Almost surely, 2^13611613 is an apocalyptic number.

It is an amenable number.

13611613 is a deficient number, since it is larger than the sum of its proper divisors (1).

13611613 is an equidigital number, since it uses as much as digits as its factorization.

13611613 is an odious number, because the sum of its binary digits is odd.

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

The square root of 13611613 is about 3689.3919553227. The cubic root of 13611613 is about 238.7645598423.

The spelling of 13611613 in words is "thirteen million, six hundred eleven thousand, six hundred thirteen".