131981849 has 8 divisors (see below), whose sum is σ = 139922688. Its totient is φ = 124271280.

The previous prime is 131981821. The next prime is 131981867. The reversal of 131981849 is 948189131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131981849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131989849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56387 + ... + 58680.

It is an arithmetic number, because the mean of its divisors is an integer number (17490336).

Almost surely, 2^131981849 is an apocalyptic number.

It is an amenable number.

131981849 is a deficient number, since it is larger than the sum of its proper divisors (7940839).

131981849 is a wasteful number, since it uses less digits than its factorization.

131981849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115135.

The product of its digits is 62208, while the sum is 44.

The square root of 131981849 is about 11488.3353450359. The cubic root of 131981849 is about 509.1409979116.

The spelling of 131981849 in words is "one hundred thirty-one million, nine hundred eighty-one thousand, eight hundred forty-nine".