131879189 has 4 divisors (see below), whose sum is σ = 142023756. Its totient is φ = 121734624.

The previous prime is 131879179. The next prime is 131879273. The reversal of 131879189 is 981978131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25170289 + 106708900 = 5017^2 + 10330^2 .

It is a cyclic number.

It is not a de Polignac number, because 131879189 - 2¹⁶ = 131813653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131879129) 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, 5072264 + ... + 5072289.

It is an arithmetic number, because the mean of its divisors is an integer number (35505939).

Almost surely, 2^131879189 is an apocalyptic number.

It is an amenable number.

131879189 is a deficient number, since it is larger than the sum of its proper divisors (10144567).

131879189 is a wasteful number, since it uses less digits than its factorization.

131879189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10144566.

The product of its digits is 108864, while the sum is 47.

The square root of 131879189 is about 11483.8664656117. The cubic root of 131879189 is about 509.0089545709.

The spelling of 131879189 in words is "one hundred thirty-one million, eight hundred seventy-nine thousand, one hundred eighty-nine".