131788771 has 2 divisors, whose sum is σ = 131788772. Its totient is φ = 131788770.

The previous prime is 131788747. The next prime is 131788817. The reversal of 131788771 is 177887131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131788771 - 2⁹ = 131788259 is a prime.

It is not a weakly prime, because it can be changed into another prime (131788721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65894385 + 65894386.

It is an arithmetic number, because the mean of its divisors is an integer number (65894386).

Almost surely, 2^131788771 is an apocalyptic number.

131788771 is a deficient number, since it is larger than the sum of its proper divisors (1).

131788771 is an equidigital number, since it uses as much as digits as its factorization.

131788771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65856, while the sum is 43.

The square root of 131788771 is about 11479.9290503034. The cubic root of 131788771 is about 508.8926003679.

The spelling of 131788771 in words is "one hundred thirty-one million, seven hundred eighty-eight thousand, seven hundred seventy-one".