131647 has 4 divisors (see below), whose sum is σ = 134496. Its totient is φ = 128800.

The previous prime is 131641. The next prime is 131671. The reversal of 131647 is 746131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746131 = 263 ⋅2837.

It is a cyclic number.

It is not a de Polignac number, because 131647 - 2³ = 131639 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131641) 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, 1354 + ... + 1447.

It is an arithmetic number, because the mean of its divisors is an integer number (33624).

2¹³¹⁶⁴⁷ is an apocalyptic number.

131647 is a deficient number, since it is larger than the sum of its proper divisors (2849).

131647 is an equidigital number, since it uses as much as digits as its factorization.

131647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848.

The product of its digits is 504, while the sum is 22.

The square root of 131647 is about 362.8319170084. The cubic root of 131647 is about 50.8710055482.

Adding to 131647 its reverse (746131), we get a palindrome (877778).

The spelling of 131647 in words is "one hundred thirty-one thousand, six hundred forty-seven".