131142691 has 2 divisors, whose sum is σ = 131142692. Its totient is φ = 131142690.

The previous prime is 131142631. The next prime is 131142707. The reversal of 131142691 is 196241131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131142691 - 2⁷ = 131142563 is a prime.

It is not a weakly prime, because it can be changed into another prime (131142601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65571345 + 65571346.

It is an arithmetic number, because the mean of its divisors is an integer number (65571346).

Almost surely, 2^131142691 is an apocalyptic number.

131142691 is a deficient number, since it is larger than the sum of its proper divisors (1).

131142691 is an equidigital number, since it uses as much as digits as its factorization.

131142691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 131142691 is about 11451.7549310138. The cubic root of 131142691 is about 508.0596409920.

The spelling of 131142691 in words is "one hundred thirty-one million, one hundred forty-two thousand, six hundred ninety-one".