131671869 has 32 divisors (see below), whose sum is σ = 209798400. Its totient is φ = 73382400.

The previous prime is 131671853. The next prime is 131671873. The reversal of 131671869 is 968176131.

It is not a de Polignac number, because 131671869 - 2⁴ = 131671853 is a prime.

It is a super-2 number, since 2×131671869² = 34674962171906322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131671869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131671829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40629 + ... + 43749.

It is an arithmetic number, because the mean of its divisors is an integer number (6556200).

Almost surely, 2^131671869 is an apocalyptic number.

It is an amenable number.

131671869 is a deficient number, since it is larger than the sum of its proper divisors (78126531).

131671869 is an equidigital number, since it uses as much as digits as its factorization.

131671869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3186 (or 3172 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 131671869 is about 11474.8363387022. The cubic root of 131671869 is about 508.7420863771.

The spelling of 131671869 in words is "one hundred thirty-one million, six hundred seventy-one thousand, eight hundred sixty-nine".