11799881 has 4 divisors (see below), whose sum is σ = 11827200. Its totient is φ = 11772564.

The previous prime is 11799869. The next prime is 11799889. The reversal of 11799881 is 18899711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18899711 = 37 ⋅510803.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11799881 is a prime.

It is a super-2 number, since 2×11799881² = 278474383228322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11799889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13001 + ... + 13878.

It is an arithmetic number, because the mean of its divisors is an integer number (2956800).

Almost surely, 2^11799881 is an apocalyptic number.

It is an amenable number.

11799881 is a deficient number, since it is larger than the sum of its proper divisors (27319).

11799881 is an equidigital number, since it uses as much as digits as its factorization.

11799881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27318.

The product of its digits is 36288, while the sum is 44.

The square root of 11799881 is about 3435.0954863002. The cubic root of 11799881 is about 227.6630461831.

The spelling of 11799881 in words is "eleven million, seven hundred ninety-nine thousand, eight hundred eighty-one".