131147917 has 4 divisors (see below), whose sum is σ = 133622460. Its totient is φ = 128673376.

The previous prime is 131147903. The next prime is 131147921. The reversal of 131147917 is 719741131.

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 86378436 + 44769481 = 9294^2 + 6691^2 .

It is a cyclic number.

It is not a de Polignac number, because 131147917 - 2²³ = 122759309 is a prime.

It is a super-2 number, since 2×131147917² = 34399552266877778, which contains 22 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 (131147957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1237192 + ... + 1237297.

It is an arithmetic number, because the mean of its divisors is an integer number (33405615).

Almost surely, 2^131147917 is an apocalyptic number.

It is an amenable number.

131147917 is a deficient number, since it is larger than the sum of its proper divisors (2474543).

131147917 is an equidigital number, since it uses as much as digits as its factorization.

131147917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474542.

The product of its digits is 5292, while the sum is 34.

The square root of 131147917 is about 11451.9831033756. The cubic root of 131147917 is about 508.0663895811.

The spelling of 131147917 in words is "one hundred thirty-one million, one hundred forty-seven thousand, nine hundred seventeen".