11885913 has 16 divisors (see below), whose sum is σ = 18963840. Its totient is φ = 7314192.

The previous prime is 11885903. The next prime is 11885921. The reversal of 11885913 is 31958811.

It is not a de Polignac number, because 11885913 - 2¹⁸ = 11623769 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (11885903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16581 + ... + 17282.

It is an arithmetic number, because the mean of its divisors is an integer number (1185240).

Almost surely, 2^11885913 is an apocalyptic number.

11885913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11885913 is a deficient number, since it is larger than the sum of its proper divisors (7077927).

11885913 is a wasteful number, since it uses less digits than its factorization.

11885913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33885 (or 33879 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 11885913 is about 3447.5952488655. The cubic root of 11885913 is about 228.2149980298.

The spelling of 11885913 in words is "eleven million, eight hundred eighty-five thousand, nine hundred thirteen".