131305277 has 2 divisors, whose sum is σ = 131305278. Its totient is φ = 131305276.

The previous prime is 131305261. The next prime is 131305289. The reversal of 131305277 is 772503131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122190916 + 9114361 = 11054^2 + 3019^2 .

It is a cyclic number.

It is not a de Polignac number, because 131305277 - 2⁴ = 131305261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131305177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65652638 + 65652639.

It is an arithmetic number, because the mean of its divisors is an integer number (65652639).

Almost surely, 2^131305277 is an apocalyptic number.

It is an amenable number.

131305277 is a deficient number, since it is larger than the sum of its proper divisors (1).

131305277 is an equidigital number, since it uses as much as digits as its factorization.

131305277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 29.

The square root of 131305277 is about 11458.8514694973. The cubic root of 131305277 is about 508.2695123197.

The spelling of 131305277 in words is "one hundred thirty-one million, three hundred five thousand, two hundred seventy-seven".