131131279 has 2 divisors, whose sum is σ = 131131280. Its totient is φ = 131131278.

The previous prime is 131131199. The next prime is 131131291. The reversal of 131131279 is 972131131.

It is a strong prime.

It is an emirp because it is prime and its reverse (972131131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131131279 - 2⁹ = 131130767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131131379) 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, 65565639 + 65565640.

It is an arithmetic number, because the mean of its divisors is an integer number (65565640).

Almost surely, 2^131131279 is an apocalyptic number.

131131279 is a deficient number, since it is larger than the sum of its proper divisors (1).

131131279 is an equidigital number, since it uses as much as digits as its factorization.

131131279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 28.

The square root of 131131279 is about 11451.2566559308. The cubic root of 131131279 is about 508.0449034956.

The spelling of 131131279 in words is "one hundred thirty-one million, one hundred thirty-one thousand, two hundred seventy-nine".