131547897 has 24 divisors (see below), whose sum is σ = 205205000. Its totient is φ = 80725248.

The previous prime is 131547883. The next prime is 131547901. The reversal of 131547897 is 798745131.

131547897 is a `hidden beast` number, since 13 + 1 + 547 + 8 + 97 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6533136 + 125014761 = 2556^2 + 11181^2 .

It is not a de Polignac number, because 131547897 - 2⁴ = 131547881 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (131547397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46479 + ... + 49227.

Almost surely, 2^131547897 is an apocalyptic number.

It is an amenable number.

131547897 is a deficient number, since it is larger than the sum of its proper divisors (73657103).

131547897 is a wasteful number, since it uses less digits than its factorization.

131547897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177 (or 3174 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 131547897 is about 11469.4331594896. The cubic root of 131547897 is about 508.5823722366.

The spelling of 131547897 in words is "one hundred thirty-one million, five hundred forty-seven thousand, eight hundred ninety-seven".