131681684 has 12 divisors (see below), whose sum is σ = 230620404. Its totient is φ = 65790144.

The previous prime is 131681681. The next prime is 131681713. The reversal of 131681684 is 486186131.

It can be written as a sum of positive squares in 2 ways, for example, as 103591684 + 28090000 = 10178^2 + 5300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131681681) 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, 6497 + ... + 17480.

It is an arithmetic number, because the mean of its divisors is an integer number (19218367).

Almost surely, 2^131681684 is an apocalyptic number.

It is an amenable number.

131681684 is a deficient number, since it is larger than the sum of its proper divisors (98938720).

131681684 is a wasteful number, since it uses less digits than its factorization.

131681684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25354 (or 25352 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 131681684 is about 11475.2640056776. The cubic root of 131681684 is about 508.7547268384.

The spelling of 131681684 in words is "one hundred thirty-one million, six hundred eighty-one thousand, six hundred eighty-four".