131929820 has 24 divisors (see below), whose sum is σ = 302239728. Its totient is φ = 47974400.

The previous prime is 131929793. The next prime is 131929829. The reversal of 131929820 is 28929131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131929829) 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, 299621 + ... + 300060.

It is an arithmetic number, because the mean of its divisors is an integer number (12593322).

Almost surely, 2^131929820 is an apocalyptic number.

131929820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131929820 is an abundant number, since it is smaller than the sum of its proper divisors (170309908).

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

131929820 is a wasteful number, since it uses less digits than its factorization.

131929820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599701 (or 599699 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 131929820 is about 11486.0706945413. The cubic root of 131929820 is about 509.0740857343.

The spelling of 131929820 in words is "one hundred thirty-one million, nine hundred twenty-nine thousand, eight hundred twenty".