131540949 has 16 divisors (see below), whose sum is σ = 198072640. Its totient is φ = 86255280.

The previous prime is 131540909. The next prime is 131540989. The reversal of 131540949 is 949045131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131540909) and next prime (131540989).

It is not a de Polignac number, because 131540949 - 2⁷ = 131540821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131540909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38287 + ... + 41580.

It is an arithmetic number, because the mean of its divisors is an integer number (12379540).

Almost surely, 2^131540949 is an apocalyptic number.

It is an amenable number.

131540949 is a deficient number, since it is larger than the sum of its proper divisors (66531691).

131540949 is an equidigital number, since it uses as much as digits as its factorization.

131540949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79937 (or 79931 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 131540949 is about 11469.1302634507. The cubic root of 131540949 is about 508.5734181025.

The spelling of 131540949 in words is "one hundred thirty-one million, five hundred forty thousand, nine hundred forty-nine".