11861913 has 16 divisors (see below), whose sum is σ = 18247680. Its totient is φ = 6713616.

The previous prime is 11861887. The next prime is 11861917. The reversal of 11861913 is 31916811.

It is not a de Polignac number, because 11861913 - 2⁶ = 11861849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11861917) 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, 393 + ... + 4886.

It is an arithmetic number, because the mean of its divisors is an integer number (1140480).

Almost surely, 2^11861913 is an apocalyptic number.

It is an amenable number.

11861913 is a deficient number, since it is larger than the sum of its proper divisors (6385767).

11861913 is a wasteful number, since it uses less digits than its factorization.

11861913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5396.

The product of its digits is 1296, while the sum is 30.

The square root of 11861913 is about 3444.1128030307. The cubic root of 11861913 is about 228.0612908477.

The spelling of 11861913 in words is "eleven million, eight hundred sixty-one thousand, nine hundred thirteen".