131247187 has 2 divisors, whose sum is σ = 131247188. Its totient is φ = 131247186.

The previous prime is 131247119. The next prime is 131247209. The reversal of 131247187 is 781742131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131247187 is a prime.

It is not a weakly prime, because it can be changed into another prime (131242187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65623593 + 65623594.

It is an arithmetic number, because the mean of its divisors is an integer number (65623594).

Almost surely, 2^131247187 is an apocalyptic number.

131247187 is a deficient number, since it is larger than the sum of its proper divisors (1).

131247187 is an equidigital number, since it uses as much as digits as its factorization.

131247187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 34.

The square root of 131247187 is about 11456.3164673467. The cubic root of 131247187 is about 508.1945477492.

The spelling of 131247187 in words is "one hundred thirty-one million, two hundred forty-seven thousand, one hundred eighty-seven".