131887111 has 2 divisors, whose sum is σ = 131887112. Its totient is φ = 131887110.

The previous prime is 131887079. The next prime is 131887127. The reversal of 131887111 is 111788131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131887111 - 2⁵ = 131887079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131887181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65943555 + 65943556.

It is an arithmetic number, because the mean of its divisors is an integer number (65943556).

Almost surely, 2^131887111 is an apocalyptic number.

131887111 is a deficient number, since it is larger than the sum of its proper divisors (1).

131887111 is an equidigital number, since it uses as much as digits as its factorization.

131887111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 31.

The square root of 131887111 is about 11484.2113791065. The cubic root of 131887111 is about 509.0191464448.

The spelling of 131887111 in words is "one hundred thirty-one million, eight hundred eighty-seven thousand, one hundred eleven".