131878443 has 8 divisors (see below), whose sum is σ = 175891456. Its totient is φ = 87892200.

The previous prime is 131878441. The next prime is 131878477. The reversal of 131878443 is 344878131.

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

It is not a de Polignac number, because 131878443 - 2¹ = 131878441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131878441) 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, 13578 + ... + 21168.

It is an arithmetic number, because the mean of its divisors is an integer number (21986432).

Almost surely, 2^131878443 is an apocalyptic number.

131878443 is a deficient number, since it is larger than the sum of its proper divisors (44013013).

131878443 is an equidigital number, since it uses as much as digits as its factorization.

131878443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13385.

The product of its digits is 64512, while the sum is 39.

The square root of 131878443 is about 11483.8339852159. The cubic root of 131878443 is about 509.0079948001.

The spelling of 131878443 in words is "one hundred thirty-one million, eight hundred seventy-eight thousand, four hundred forty-three".