131873720 has 128 divisors (see below), whose sum is σ = 344010240. Its totient is φ = 45027840.

The previous prime is 131873719. The next prime is 131873741. The reversal of 131873720 is 27378131.

131873720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 839882 + ... + 840038.

It is an arithmetic number, because the mean of its divisors is an integer number (2687580).

Almost surely, 2^131873720 is an apocalyptic number.

131873720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131873720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172005120).

131873720 is an abundant number, since it is smaller than the sum of its proper divisors (212136520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131873720 is a wasteful number, since it uses less digits than its factorization.

131873720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 131873720 is about 11483.6283464766. The cubic root of 131873720 is about 509.0019183118.

The spelling of 131873720 in words is "one hundred thirty-one million, eight hundred seventy-three thousand, seven hundred twenty".