11929161 has 4 divisors (see below), whose sum is σ = 15905552. Its totient is φ = 7952772.

The previous prime is 11929153. The next prime is 11929163. The reversal of 11929161 is 16192911.

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.

It is not a de Polignac number, because 11929161 - 2³ = 11929153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11929163) 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, 1988191 + ... + 1988196.

It is an arithmetic number, because the mean of its divisors is an integer number (3976388).

Almost surely, 2^11929161 is an apocalyptic number.

It is an amenable number.

11929161 is a deficient number, since it is larger than the sum of its proper divisors (3976391).

11929161 is an equidigital number, since it uses as much as digits as its factorization.

11929161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976390.

The product of its digits is 972, while the sum is 30.

The square root of 11929161 is about 3453.8617517208. The cubic root of 11929161 is about 228.4914568259.

It can be divided in two parts, 11929 and 161, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 11929161 in words is "eleven million, nine hundred twenty-nine thousand, one hundred sixty-one".