11817995 has 24 divisors (see below), whose sum is σ = 16656864. Its totient is φ = 7884288.

The previous prime is 11817983. The next prime is 11817997. The reversal of 11817995 is 59971811.

11817995 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11817995 - 2⁴ = 11817979 is a prime.

Its product of digits (22680) is a multiple of the sum of its prime divisors (168).

It is not an unprimeable number, because it can be changed into a prime (11817997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121787 + ... + 121883.

It is an arithmetic number, because the mean of its divisors is an integer number (694036).

Almost surely, 2^11817995 is an apocalyptic number.

11817995 is a deficient number, since it is larger than the sum of its proper divisors (4838869).

11817995 is an frugal number, since it uses more digits than its factorization.

11817995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 168 counting only the distinct ones).

The product of its digits is 22680, while the sum is 41.

The square root of 11817995 is about 3437.7310831419. The cubic root of 11817995 is about 227.7794818213.

The spelling of 11817995 in words is "eleven million, eight hundred seventeen thousand, nine hundred ninety-five".