131886091 has 2 divisors, whose sum is σ = 131886092. Its totient is φ = 131886090.

The previous prime is 131886077. The next prime is 131886137. The reversal of 131886091 is 190688131.

It is a weak prime.

It is an emirp because it is prime and its reverse (190688131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131886091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131886091.

It is not a weakly prime, because it can be changed into another prime (131886061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65943045 + 65943046.

It is an arithmetic number, because the mean of its divisors is an integer number (65943046).

Almost surely, 2^131886091 is an apocalyptic number.

131886091 is a deficient number, since it is larger than the sum of its proper divisors (1).

131886091 is an equidigital number, since it uses as much as digits as its factorization.

131886091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 131886091 is about 11484.1669702247. The cubic root of 131886091 is about 509.0178342093.

The spelling of 131886091 in words is "one hundred thirty-one million, eight hundred eighty-six thousand, ninety-one".