131289547 has 4 divisors (see below), whose sum is σ = 132951520. Its totient is φ = 129627576.

The previous prime is 131289541. The next prime is 131289569. The reversal of 131289547 is 745982131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131289547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131289541) 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, 830868 + ... + 831025.

It is an arithmetic number, because the mean of its divisors is an integer number (33237880).

Almost surely, 2^131289547 is an apocalyptic number.

131289547 is a deficient number, since it is larger than the sum of its proper divisors (1661973).

131289547 is an equidigital number, since it uses as much as digits as its factorization.

131289547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661972.

The product of its digits is 60480, while the sum is 40.

The square root of 131289547 is about 11458.1650799768. The cubic root of 131289547 is about 508.2492150935.

The spelling of 131289547 in words is "one hundred thirty-one million, two hundred eighty-nine thousand, five hundred forty-seven".