131347992 has 64 divisors (see below), whose sum is σ = 345461760. Its totient is φ = 41558400.

The previous prime is 131347987. The next prime is 131348003. The reversal of 131347992 is 299743131.

It is a self number, because there is not a number n which added to its sum of digits gives 131347992.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37767 + ... + 41097.

It is an arithmetic number, because the mean of its divisors is an integer number (5397840).

Almost surely, 2^131347992 is an apocalyptic number.

131347992 is a gapful number since it is divisible by the number (12) 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 131347992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172730880).

131347992 is an abundant number, since it is smaller than the sum of its proper divisors (214113768).

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

131347992 is a wasteful number, since it uses less digits than its factorization.

131347992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424 (or 3420 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 131347992 is about 11460.7151609313. The cubic root of 131347992 is about 508.3246214996.

The spelling of 131347992 in words is "one hundred thirty-one million, three hundred forty-seven thousand, nine hundred ninety-two".