11923161 has 4 divisors (see below), whose sum is σ = 15897552. Its totient is φ = 7948772.

The previous prime is 11923159. The next prime is 11923181. The reversal of 11923161 is 16132911.

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: 16132911 = 3 ⋅5377637.

It is a cyclic number.

It is not a de Polignac number, because 11923161 - 2¹ = 11923159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11923181) 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, 1987191 + ... + 1987196.

It is an arithmetic number, because the mean of its divisors is an integer number (3974388).

Almost surely, 2^11923161 is an apocalyptic number.

It is an amenable number.

11923161 is a deficient number, since it is larger than the sum of its proper divisors (3974391).

11923161 is an equidigital number, since it uses as much as digits as its factorization.

11923161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3974390.

The product of its digits is 324, while the sum is 24.

The square root of 11923161 is about 3452.9930495152. The cubic root of 11923161 is about 228.4531423500.

The spelling of 11923161 in words is "eleven million, nine hundred twenty-three thousand, one hundred sixty-one".