131311867 has 2 divisors, whose sum is σ = 131311868. Its totient is φ = 131311866.

The previous prime is 131311849. The next prime is 131311871. The reversal of 131311867 is 768113131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131311867 is a prime.

It is not a weakly prime, because it can be changed into another prime (131318867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65655933 + 65655934.

It is an arithmetic number, because the mean of its divisors is an integer number (65655934).

Almost surely, 2^131311867 is an apocalyptic number.

131311867 is a deficient number, since it is larger than the sum of its proper divisors (1).

131311867 is an equidigital number, since it uses as much as digits as its factorization.

131311867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 31.

The square root of 131311867 is about 11459.1390165230. The cubic root of 131311867 is about 508.2780152530.

Adding to 131311867 its reverse (768113131), we get a palindrome (899424998).

The spelling of 131311867 in words is "one hundred thirty-one million, three hundred eleven thousand, eight hundred sixty-seven".