130765861 has 2 divisors, whose sum is σ = 130765862. Its totient is φ = 130765860.

The previous prime is 130765837. The next prime is 130765867. The reversal of 130765861 is 168567031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112232836 + 18533025 = 10594^2 + 4305^2 .

It is a cyclic number.

It is not a de Polignac number, because 130765861 - 2²³ = 122377253 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 130765861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130765867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65382930 + 65382931.

It is an arithmetic number, because the mean of its divisors is an integer number (65382931).

Almost surely, 2^130765861 is an apocalyptic number.

It is an amenable number.

130765861 is a deficient number, since it is larger than the sum of its proper divisors (1).

130765861 is an equidigital number, since it uses as much as digits as its factorization.

130765861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 130765861 is about 11435.2901581027. The cubic root of 130765861 is about 507.5725486973.

The spelling of 130765861 in words is "one hundred thirty million, seven hundred sixty-five thousand, eight hundred sixty-one".