131039191 has 2 divisors, whose sum is σ = 131039192. Its totient is φ = 131039190.

The previous prime is 131039173. The next prime is 131039221. The reversal of 131039191 is 191930131.

It is a weak prime.

It is an emirp because it is prime and its reverse (191930131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131039191 - 2²⁵ = 97484759 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131039131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65519595 + 65519596.

It is an arithmetic number, because the mean of its divisors is an integer number (65519596).

Almost surely, 2^131039191 is an apocalyptic number.

131039191 is a deficient number, since it is larger than the sum of its proper divisors (1).

131039191 is an equidigital number, since it uses as much as digits as its factorization.

131039191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 131039191 is about 11447.2350810141. The cubic root of 131039191 is about 507.9259494332.

The spelling of 131039191 in words is "one hundred thirty-one million, thirty-nine thousand, one hundred ninety-one".