131181859 has 2 divisors, whose sum is σ = 131181860. Its totient is φ = 131181858.

The previous prime is 131181829. The next prime is 131181881. The reversal of 131181859 is 958181131.

It is a strong prime.

It is an emirp because it is prime and its reverse (958181131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131181859 - 2¹⁵ = 131149091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131181829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65590929 + 65590930.

It is an arithmetic number, because the mean of its divisors is an integer number (65590930).

Almost surely, 2^131181859 is an apocalyptic number.

131181859 is a deficient number, since it is larger than the sum of its proper divisors (1).

131181859 is an equidigital number, since it uses as much as digits as its factorization.

131181859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 37.

The square root of 131181859 is about 11453.4649342459. The cubic root of 131181859 is about 508.1102161811.

The spelling of 131181859 in words is "one hundred thirty-one million, one hundred eighty-one thousand, eight hundred fifty-nine".