131537747 has 4 divisors (see below), whose sum is σ = 143495736. Its totient is φ = 119579760.

The previous prime is 131537719. The next prime is 131537753. The reversal of 131537747 is 747735131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 131537747 - 2²⁰ = 130489171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131537747.

It is not an unprimeable number, because it can be changed into a prime (131537767) 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 3 ways as a sum of consecutive naturals, for example, 5978978 + ... + 5978999.

It is an arithmetic number, because the mean of its divisors is an integer number (35873934).

Almost surely, 2^131537747 is an apocalyptic number.

131537747 is a deficient number, since it is larger than the sum of its proper divisors (11957989).

131537747 is a wasteful number, since it uses less digits than its factorization.

131537747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11957988.

The product of its digits is 61740, while the sum is 38.

The square root of 131537747 is about 11468.9906704993. The cubic root of 131537747 is about 508.5692914653.

The spelling of 131537747 in words is "one hundred thirty-one million, five hundred thirty-seven thousand, seven hundred forty-seven".