131439980 has 24 divisors (see below), whose sum is σ = 315456288. Its totient is φ = 45065088.

The previous prime is 131439961. The next prime is 131439983. The reversal of 131439980 is 89934131.

It is a happy number.

131439980 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (131439983) 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 7 ways as a sum of consecutive naturals, for example, 469289 + ... + 469568.

It is an arithmetic number, because the mean of its divisors is an integer number (13144012).

Almost surely, 2^131439980 is an apocalyptic number.

131439980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131439980 is an abundant number, since it is smaller than the sum of its proper divisors (184016308).

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

131439980 is a wasteful number, since it uses less digits than its factorization.

131439980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938873 (or 938871 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 131439980 is about 11464.7276461327. The cubic root of 131439980 is about 508.4432601706.

The spelling of 131439980 in words is "one hundred thirty-one million, four hundred thirty-nine thousand, nine hundred eighty".