11915899 has 2 divisors, whose sum is σ = 11915900. Its totient is φ = 11915898.

The previous prime is 11915881. The next prime is 11915903. The reversal of 11915899 is 99851911.

It is a strong prime.

It is an emirp because it is prime and its reverse (99851911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11915899 - 2⁵ = 11915867 is a prime.

It is not a weakly prime, because it can be changed into another prime (11915809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5957949 + 5957950.

It is an arithmetic number, because the mean of its divisors is an integer number (5957950).

Almost surely, 2^11915899 is an apocalyptic number.

11915899 is a deficient number, since it is larger than the sum of its proper divisors (1).

11915899 is an equidigital number, since it uses as much as digits as its factorization.

11915899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 43.

The square root of 11915899 is about 3451.9413378561. The cubic root of 11915899 is about 228.4067518653.

It can be divided in two parts, 119 and 15899, that multiplied together give a palindrome (1891981).

The spelling of 11915899 in words is "eleven million, nine hundred fifteen thousand, eight hundred ninety-nine".