11515589 has 2 divisors, whose sum is σ = 11515590. Its totient is φ = 11515588.

The previous prime is 11515541. The next prime is 11515591. The reversal of 11515589 is 98551511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9060100 + 2455489 = 3010^2 + 1567^2 .

It is a cyclic number.

It is not a de Polignac number, because 11515589 - 2⁸ = 11515333 is a prime.

Together with 11515591, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11515289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757794 + 5757795.

It is an arithmetic number, because the mean of its divisors is an integer number (5757795).

Almost surely, 2^11515589 is an apocalyptic number.

It is an amenable number.

11515589 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515589 is an equidigital number, since it uses as much as digits as its factorization.

11515589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 35.

The square root of 11515589 is about 3393.4626858122. The cubic root of 11515589 is about 225.8198174882.

The spelling of 11515589 in words is "eleven million, five hundred fifteen thousand, five hundred eighty-nine".