13855613 has 2 divisors, whose sum is σ = 13855614. Its totient is φ = 13855612.

The previous prime is 13855607. The next prime is 13855627. The reversal of 13855613 is 31655831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9746884 + 4108729 = 3122^2 + 2027^2 .

It is a cyclic number.

It is not a de Polignac number, because 13855613 - 2⁶ = 13855549 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13855613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13851613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6927806 + 6927807.

It is an arithmetic number, because the mean of its divisors is an integer number (6927807).

Almost surely, 2^13855613 is an apocalyptic number.

It is an amenable number.

13855613 is a deficient number, since it is larger than the sum of its proper divisors (1).

13855613 is an equidigital number, since it uses as much as digits as its factorization.

13855613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 13855613 is about 3722.3128562763. The cubic root of 13855613 is about 240.1828063242.

The spelling of 13855613 in words is "thirteen million, eight hundred fifty-five thousand, six hundred thirteen".