131045647 has 4 divisors (see below), whose sum is σ = 132518160. Its totient is φ = 129573136.

The previous prime is 131045633. The next prime is 131045657. The reversal of 131045647 is 746540131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746540131 = 2927 ⋅255053.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131045647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131045617) 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, 736123 + ... + 736300.

It is an arithmetic number, because the mean of its divisors is an integer number (33129540).

Almost surely, 2^131045647 is an apocalyptic number.

131045647 is a deficient number, since it is larger than the sum of its proper divisors (1472513).

131045647 is an equidigital number, since it uses as much as digits as its factorization.

131045647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472512.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 131045647 is about 11447.5170670325. The cubic root of 131045647 is about 507.9342907445.

Adding to 131045647 its reverse (746540131), we get a palindrome (877585778).

The spelling of 131045647 in words is "one hundred thirty-one million, forty-five thousand, six hundred forty-seven".