131755691 has 2 divisors, whose sum is σ = 131755692. Its totient is φ = 131755690.

The previous prime is 131755667. The next prime is 131755697. The reversal of 131755691 is 196557131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131755691 is a prime.

It is a super-2 number, since 2×131755691² = 34719124221774962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131755697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65877845 + 65877846.

It is an arithmetic number, because the mean of its divisors is an integer number (65877846).

Almost surely, 2^131755691 is an apocalyptic number.

131755691 is a deficient number, since it is larger than the sum of its proper divisors (1).

131755691 is an equidigital number, since it uses as much as digits as its factorization.

131755691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 38.

The square root of 131755691 is about 11478.4881844257. The cubic root of 131755691 is about 508.8500181464.

The spelling of 131755691 in words is "one hundred thirty-one million, seven hundred fifty-five thousand, six hundred ninety-one".