11564013 has 4 divisors (see below), whose sum is σ = 15418688. Its totient is φ = 7709340.

The previous prime is 11563997. The next prime is 11564051. The reversal of 11564013 is 31046511.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31046511 = 3 ⋅10348837.

It is not a de Polignac number, because 11564013 - 2⁴ = 11563997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11564083) 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, 1927333 + ... + 1927338.

It is an arithmetic number, because the mean of its divisors is an integer number (3854672).

Almost surely, 2^11564013 is an apocalyptic number.

It is an amenable number.

11564013 is a deficient number, since it is larger than the sum of its proper divisors (3854675).

11564013 is an equidigital number, since it uses as much as digits as its factorization.

11564013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3854674.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 11564013 is about 3400.5900958510. The cubic root of 11564013 is about 226.1359051524.

The spelling of 11564013 in words is "eleven million, five hundred sixty-four thousand, thirteen".