131179261 has 2 divisors, whose sum is σ = 131179262. Its totient is φ = 131179260.

The previous prime is 131179253. The next prime is 131179271. The reversal of 131179261 is 162971131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130644900 + 534361 = 11430^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 131179261 - 2³ = 131179253 is a prime.

It is a super-2 number, since 2×131179261² = 34415997033012242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131179201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65589630 + 65589631.

It is an arithmetic number, because the mean of its divisors is an integer number (65589631).

Almost surely, 2^131179261 is an apocalyptic number.

It is an amenable number.

131179261 is a deficient number, since it is larger than the sum of its proper divisors (1).

131179261 is an equidigital number, since it uses as much as digits as its factorization.

131179261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 31.

The square root of 131179261 is about 11453.3515182238. The cubic root of 131179261 is about 508.1068618579.

The spelling of 131179261 in words is "one hundred thirty-one million, one hundred seventy-nine thousand, two hundred sixty-one".