11564869 has 2 divisors, whose sum is σ = 11564870. Its totient is φ = 11564868.

The previous prime is 11564851. The next prime is 11564873. The reversal of 11564869 is 96846511.

11564869 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., 6890625 + 4674244 = 2625^2 + 2162^2 .

It is a cyclic number.

It is not a de Polignac number, because 11564869 - 2⁷ = 11564741 is a prime.

It is a super-2 number, since 2×11564869² = 267492389974322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11564849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782434 + 5782435.

It is an arithmetic number, because the mean of its divisors is an integer number (5782435).

Almost surely, 2^11564869 is an apocalyptic number.

It is an amenable number.

11564869 is a deficient number, since it is larger than the sum of its proper divisors (1).

11564869 is an equidigital number, since it uses as much as digits as its factorization.

11564869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 11564869 is about 3400.7159540309. The cubic root of 11564869 is about 226.1414847483.

The spelling of 11564869 in words is "eleven million, five hundred sixty-four thousand, eight hundred sixty-nine".