131011187 has 2 divisors, whose sum is σ = 131011188. Its totient is φ = 131011186.

The previous prime is 131011169. The next prime is 131011189. The reversal of 131011187 is 781110131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131011187 - 2⁶ = 131011123 is a prime.

It is a super-2 number, since 2×131011187² = 34327862238297938, which contains 22 as substring.

Together with 131011189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131011189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65505593 + 65505594.

It is an arithmetic number, because the mean of its divisors is an integer number (65505594).

Almost surely, 2^131011187 is an apocalyptic number.

131011187 is a deficient number, since it is larger than the sum of its proper divisors (1).

131011187 is an equidigital number, since it uses as much as digits as its factorization.

131011187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 23.

The square root of 131011187 is about 11446.0118381906. The cubic root of 131011187 is about 507.8897644019.

The spelling of 131011187 in words is "one hundred thirty-one million, eleven thousand, one hundred eighty-seven".