131887117 has 4 divisors (see below), whose sum is σ = 133246876. Its totient is φ = 130527360.

The previous prime is 131887111. The next prime is 131887127. The reversal of 131887117 is 711788131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17589636 + 114297481 = 4194^2 + 10691^2 .

It is a cyclic number.

It is not a de Polignac number, because 131887117 - 2²³ = 123498509 is a prime.

It is a super-3 number, since 3×131887117³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131887111) 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, 679734 + ... + 679927.

It is an arithmetic number, because the mean of its divisors is an integer number (33311719).

Almost surely, 2^131887117 is an apocalyptic number.

It is an amenable number.

131887117 is a deficient number, since it is larger than the sum of its proper divisors (1359759).

131887117 is an equidigital number, since it uses as much as digits as its factorization.

131887117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359758.

The product of its digits is 9408, while the sum is 37.

The square root of 131887117 is about 11484.2116403347. The cubic root of 131887117 is about 509.0191541638.

The spelling of 131887117 in words is "one hundred thirty-one million, eight hundred eighty-seven thousand, one hundred seventeen".