13618613 has 2 divisors, whose sum is σ = 13618614. Its totient is φ = 13618612.

The previous prime is 13618609. The next prime is 13618667. The reversal of 13618613 is 31681631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12909649 + 708964 = 3593^2 + 842^2 .

It is a cyclic number.

It is not a de Polignac number, because 13618613 - 2² = 13618609 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13611613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6809306 + 6809307.

It is an arithmetic number, because the mean of its divisors is an integer number (6809307).

Almost surely, 2^13618613 is an apocalyptic number.

It is an amenable number.

13618613 is a deficient number, since it is larger than the sum of its proper divisors (1).

13618613 is an equidigital number, since it uses as much as digits as its factorization.

13618613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 13618613 is about 3690.3404991952. The cubic root of 13618613 is about 238.8054823863.

The spelling of 13618613 in words is "thirteen million, six hundred eighteen thousand, six hundred thirteen".