11563613 has 2 divisors, whose sum is σ = 11563614. Its totient is φ = 11563612.

The previous prime is 11563583. The next prime is 11563627. The reversal of 11563613 is 31636511.

11563613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11042329 + 521284 = 3323^2 + 722^2 .

It is a cyclic number.

It is not a de Polignac number, because 11563613 - 2²² = 7369309 is a prime.

It is a super-2 number, since 2×11563613² = 267434291227538, which contains 22 as substring.

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 (11563693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5781806 + 5781807.

It is an arithmetic number, because the mean of its divisors is an integer number (5781807).

Almost surely, 2^11563613 is an apocalyptic number.

It is an amenable number.

11563613 is a deficient number, since it is larger than the sum of its proper divisors (1).

11563613 is an equidigital number, since it uses as much as digits as its factorization.

11563613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 26.

The square root of 11563613 is about 3400.5312820205. The cubic root of 11563613 is about 226.1332977702.

The spelling of 11563613 in words is "eleven million, five hundred sixty-three thousand, six hundred thirteen".