131009687 has 2 divisors, whose sum is σ = 131009688. Its totient is φ = 131009686.

The previous prime is 131009651. The next prime is 131009699. The reversal of 131009687 is 786900131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131009687 - 2¹⁸ = 130747543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131009647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65504843 + 65504844.

It is an arithmetic number, because the mean of its divisors is an integer number (65504844).

Almost surely, 2^131009687 is an apocalyptic number.

131009687 is a deficient number, since it is larger than the sum of its proper divisors (1).

131009687 is an equidigital number, since it uses as much as digits as its factorization.

131009687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 131009687 is about 11445.9463129966. The cubic root of 131009687 is about 507.8878260495.

The spelling of 131009687 in words is "one hundred thirty-one million, nine thousand, six hundred eighty-seven".