131809983 has 8 divisors (see below), whose sum is σ = 177389568. Its totient is φ = 87051864.

The previous prime is 131809981. The next prime is 131809991. The reversal of 131809983 is 389908131.

It is a happy number.

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

It is not a de Polignac number, because 131809983 - 2¹ = 131809981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131809981) 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, 204991 + ... + 205632.

It is an arithmetic number, because the mean of its divisors is an integer number (22173696).

Almost surely, 2^131809983 is an apocalyptic number.

131809983 is a deficient number, since it is larger than the sum of its proper divisors (45579585).

131809983 is a wasteful number, since it uses less digits than its factorization.

131809983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410733.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 131809983 is about 11480.8528864366. The cubic root of 131809983 is about 508.9199017601.

The spelling of 131809983 in words is "one hundred thirty-one million, eight hundred nine thousand, nine hundred eighty-three".