131909159 has 2 divisors, whose sum is σ = 131909160. Its totient is φ = 131909158.

The previous prime is 131909051. The next prime is 131909189. The reversal of 131909159 is 951909131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (951909131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131909159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131909189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65954579 + 65954580.

It is an arithmetic number, because the mean of its divisors is an integer number (65954580).

Almost surely, 2^131909159 is an apocalyptic number.

131909159 is a deficient number, since it is larger than the sum of its proper divisors (1).

131909159 is an equidigital number, since it uses as much as digits as its factorization.

131909159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10935, while the sum is 38.

The square root of 131909159 is about 11485.1712655929. The cubic root of 131909159 is about 509.0475096633.

The spelling of 131909159 in words is "one hundred thirty-one million, nine hundred nine thousand, one hundred fifty-nine".