131797769 has 2 divisors, whose sum is σ = 131797770. Its totient is φ = 131797768.

The previous prime is 131797747. The next prime is 131797781. The reversal of 131797769 is 967797131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95316169 + 36481600 = 9763^2 + 6040^2 .

It is a cyclic number.

It is not a de Polignac number, because 131797769 - 2¹⁶ = 131732233 is a prime.

It is a super-2 number, since 2×131797769² = 34741303826754722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131797069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65898884 + 65898885.

It is an arithmetic number, because the mean of its divisors is an integer number (65898885).

Almost surely, 2^131797769 is an apocalyptic number.

It is an amenable number.

131797769 is a deficient number, since it is larger than the sum of its proper divisors (1).

131797769 is an equidigital number, since it uses as much as digits as its factorization.

131797769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 500094, while the sum is 50.

The square root of 131797769 is about 11480.3209449910. The cubic root of 131797769 is about 508.9041818084.

The spelling of 131797769 in words is "one hundred thirty-one million, seven hundred ninety-seven thousand, seven hundred sixty-nine".