189131 has 4 divisors (see below), whose sum is σ = 195264. Its totient is φ = 183000.

The previous prime is 189127. The next prime is 189139. The reversal of 189131 is 131981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131981 = 191 ⋅691.

It is a cyclic number.

It is not a de Polignac number, because 189131 - 2² = 189127 is a prime.

It is a super-2 number, since 2×189131² = 71541070322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189097 and 189106.

It is not an unprimeable number, because it can be changed into a prime (189139) 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, 3020 + ... + 3081.

It is an arithmetic number, because the mean of its divisors is an integer number (48816).

2¹⁸⁹¹³¹ is an apocalyptic number.

189131 is a deficient number, since it is larger than the sum of its proper divisors (6133).

189131 is an equidigital number, since it uses as much as digits as its factorization.

189131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6132.

The product of its digits is 216, while the sum is 23.

The square root of 189131 is about 434.8919406013. The cubic root of 189131 is about 57.4011913620.

The spelling of 189131 in words is "one hundred eighty-nine thousand, one hundred thirty-one".