131687936 has 40 divisors (see below), whose sum is σ = 276987480. Its totient is φ = 62373888.

The previous prime is 131687911. The next prime is 131687939. The reversal of 131687936 is 639786131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131687939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2960 + ... + 16496.

It is an arithmetic number, because the mean of its divisors is an integer number (6924687).

Almost surely, 2^131687936 is an apocalyptic number.

131687936 is a gapful number since it is divisible by the number (16) 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 131687936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138493740).

131687936 is an abundant number, since it is smaller than the sum of its proper divisors (145299544).

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

131687936 is an equidigital number, since it uses as much as digits as its factorization.

131687936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13574 (or 13558 counting only the distinct ones).

The product of its digits is 163296, while the sum is 44.

The square root of 131687936 is about 11475.5364144775. The cubic root of 131687936 is about 508.7627782852.

The spelling of 131687936 in words is "one hundred thirty-one million, six hundred eighty-seven thousand, nine hundred thirty-six".