131942189 has 4 divisors (see below), whose sum is σ = 135010656. Its totient is φ = 128873724.

The previous prime is 131942183. The next prime is 131942201. The reversal of 131942189 is 981249131.

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 a cyclic number.

It is not a de Polignac number, because 131942189 - 2⁸ = 131941933 is a prime.

It is a super-2 number, since 2×131942189² = 34817482476223442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131942183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1534169 + ... + 1534254.

It is an arithmetic number, because the mean of its divisors is an integer number (33752664).

Almost surely, 2^131942189 is an apocalyptic number.

It is an amenable number.

131942189 is a deficient number, since it is larger than the sum of its proper divisors (3068467).

131942189 is an equidigital number, since it uses as much as digits as its factorization.

131942189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068466.

The product of its digits is 15552, while the sum is 38.

The square root of 131942189 is about 11486.6091167063. The cubic root of 131942189 is about 509.0899945475.

The spelling of 131942189 in words is "one hundred thirty-one million, nine hundred forty-two thousand, one hundred eighty-nine".