131264239 has 2 divisors, whose sum is σ = 131264240. Its totient is φ = 131264238.

The previous prime is 131264213. The next prime is 131264249. The reversal of 131264239 is 932462131.

It is a strong prime.

It is an emirp because it is prime and its reverse (932462131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131264239 - 2¹⁹ = 130739951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131264239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131264209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65632119 + 65632120.

It is an arithmetic number, because the mean of its divisors is an integer number (65632120).

Almost surely, 2^131264239 is an apocalyptic number.

131264239 is a deficient number, since it is larger than the sum of its proper divisors (1).

131264239 is an equidigital number, since it uses as much as digits as its factorization.

131264239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 131264239 is about 11457.0606614437. The cubic root of 131264239 is about 508.2165554797.

The spelling of 131264239 in words is "one hundred thirty-one million, two hundred sixty-four thousand, two hundred thirty-nine".