131091456787 has 2 divisors, whose sum is σ = 131091456788. Its totient is φ = 131091456786.

The previous prime is 131091456689. The next prime is 131091456803. The reversal of 131091456787 is 787654190131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131091456787 - 2⁷ = 131091456659 is a prime.

It is not a weakly prime, because it can be changed into another prime (131091456187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65545728393 + 65545728394.

It is an arithmetic number, because the mean of its divisors is an integer number (65545728394).

Almost surely, 2^131091456787 is an apocalyptic number.

131091456787 is a deficient number, since it is larger than the sum of its proper divisors (1).

131091456787 is an equidigital number, since it uses as much as digits as its factorization.

131091456787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 131091456787 in words is "one hundred thirty-one billion, ninety-one million, four hundred fifty-six thousand, seven hundred eighty-seven".