13613623 has 2 divisors, whose sum is σ = 13613624. Its totient is φ = 13613622.

The previous prime is 13613609. The next prime is 13613647. The reversal of 13613623 is 32631631.

It is a weak prime.

It is an emirp because it is prime and its reverse (32631631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13613623 - 2⁵ = 13613591 is a prime.

It is a super-2 number, since 2×13613623² = 370661462372258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13613653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6806811 + 6806812.

It is an arithmetic number, because the mean of its divisors is an integer number (6806812).

Almost surely, 2^13613623 is an apocalyptic number.

13613623 is a deficient number, since it is larger than the sum of its proper divisors (1).

13613623 is an equidigital number, since it uses as much as digits as its factorization.

13613623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 25.

The square root of 13613623 is about 3689.6643478777. The cubic root of 13613623 is about 238.7763118941.

The spelling of 13613623 in words is "thirteen million, six hundred thirteen thousand, six hundred twenty-three".