131698769 has 2 divisors, whose sum is σ = 131698770. Its totient is φ = 131698768.

The previous prime is 131698691. The next prime is 131698781. The reversal of 131698769 is 967896131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74166544 + 57532225 = 8612^2 + 7585^2 .

It is a cyclic number.

It is not a de Polignac number, because 131698769 - 2⁸ = 131698513 is a prime.

It is a super-2 number, since 2×131698769² = 34689131512230722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (136698769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65849384 + 65849385.

It is an arithmetic number, because the mean of its divisors is an integer number (65849385).

Almost surely, 2^131698769 is an apocalyptic number.

It is an amenable number.

131698769 is a deficient number, since it is larger than the sum of its proper divisors (1).

131698769 is an equidigital number, since it uses as much as digits as its factorization.

131698769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 50.

The square root of 131698769 is about 11476.0084088502. The cubic root of 131698769 is about 508.7767286293.

The spelling of 131698769 in words is "one hundred thirty-one million, six hundred ninety-eight thousand, seven hundred sixty-nine".