131646873 has 4 divisors (see below), whose sum is σ = 175529168. Its totient is φ = 87764580.

The previous prime is 131646869. The next prime is 131646883. The reversal of 131646873 is 378646131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 131646873 - 2² = 131646869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131646883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21941143 + ... + 21941148.

It is an arithmetic number, because the mean of its divisors is an integer number (43882292).

Almost surely, 2^131646873 is an apocalyptic number.

It is an amenable number.

131646873 is a deficient number, since it is larger than the sum of its proper divisors (43882295).

131646873 is an equidigital number, since it uses as much as digits as its factorization.

131646873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43882294.

The product of its digits is 72576, while the sum is 39.

The square root of 131646873 is about 11473.7471211457. The cubic root of 131646873 is about 508.7098918973.

The spelling of 131646873 in words is "one hundred thirty-one million, six hundred forty-six thousand, eight hundred seventy-three".