11899559 has 4 divisors (see below), whose sum is σ = 13599504. Its totient is φ = 10199616.

The previous prime is 11899549. The next prime is 11899583. The reversal of 11899559 is 95599811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95599811 = 19 ⋅5031569.

It is a de Polignac number, because none of the positive numbers 2^k-11899559 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 (11899549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849962 + ... + 849975.

It is an arithmetic number, because the mean of its divisors is an integer number (3399876).

Almost surely, 2^11899559 is an apocalyptic number.

11899559 is a deficient number, since it is larger than the sum of its proper divisors (1699945).

11899559 is an equidigital number, since it uses as much as digits as its factorization.

11899559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699944.

The product of its digits is 145800, while the sum is 47.

The square root of 11899559 is about 3449.5737417832. The cubic root of 11899559 is about 228.3023011207.

The spelling of 11899559 in words is "eleven million, eight hundred ninety-nine thousand, five hundred fifty-nine".