131696538 has 16 divisors (see below), whose sum is σ = 268997760. Its totient is φ = 42964736.

The previous prime is 131696531. The next prime is 131696557. The reversal of 131696538 is 835696131.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131696538.

It is not an unprimeable number, because it can be changed into a prime (131696531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233223 + ... + 233786.

It is an arithmetic number, because the mean of its divisors is an integer number (16812360).

Almost surely, 2^131696538 is an apocalyptic number.

131696538 is an abundant number, since it is smaller than the sum of its proper divisors (137301222).

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

131696538 is a wasteful number, since it uses less digits than its factorization.

131696538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467061.

The product of its digits is 116640, while the sum is 42.

The square root of 131696538 is about 11475.9112056516. The cubic root of 131696538 is about 508.7738556911.

The spelling of 131696538 in words is "one hundred thirty-one million, six hundred ninety-six thousand, five hundred thirty-eight".