131709726 has 20 divisors (see below), whose sum is σ = 295127712. Its totient is φ = 43903188.

The previous prime is 131709719. The next prime is 131709737. The reversal of 131709726 is 627907131.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 406350 + ... + 406673.

Almost surely, 2^131709726 is an apocalyptic number.

131709726 is an abundant number, since it is smaller than the sum of its proper divisors (163417986).

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

131709726 is an equidigital number, since it uses as much as digits as its factorization.

131709726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813037 (or 813028 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 131709726 is about 11476.4857861629. The cubic root of 131709726 is about 508.7908378779.

The spelling of 131709726 in words is "one hundred thirty-one million, seven hundred nine thousand, seven hundred twenty-six".