13613761 has 4 divisors (see below), whose sum is σ = 15558592. Its totient is φ = 11668932.

The previous prime is 13613741. The next prime is 13613767. The reversal of 13613761 is 16731631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13613761 - 2²³ = 5225153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13613767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972405 + ... + 972418.

It is an arithmetic number, because the mean of its divisors is an integer number (3889648).

Almost surely, 2^13613761 is an apocalyptic number.

It is an amenable number.

13613761 is a deficient number, since it is larger than the sum of its proper divisors (1944831).

13613761 is an equidigital number, since it uses as much as digits as its factorization.

13613761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944830.

The product of its digits is 2268, while the sum is 28.

The square root of 13613761 is about 3689.6830487184. The cubic root of 13613761 is about 238.7771187090. Note that the first 3 decimals are identical.

The spelling of 13613761 in words is "thirteen million, six hundred thirteen thousand, seven hundred sixty-one".