131782289 has 4 divisors (see below), whose sum is σ = 132198324. Its totient is φ = 131366256.

The previous prime is 131782253. The next prime is 131782291. The reversal of 131782289 is 982287131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64000000 + 67782289 = 8000^2 + 8233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131782289 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (131782489) 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, 207542 + ... + 208175.

It is an arithmetic number, because the mean of its divisors is an integer number (33049581).

Almost surely, 2^131782289 is an apocalyptic number.

It is an amenable number.

131782289 is a deficient number, since it is larger than the sum of its proper divisors (416035).

131782289 is an equidigital number, since it uses as much as digits as its factorization.

131782289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416034.

The product of its digits is 48384, while the sum is 41.

The square root of 131782289 is about 11479.6467280139. The cubic root of 131782289 is about 508.8842569765.

The spelling of 131782289 in words is "one hundred thirty-one million, seven hundred eighty-two thousand, two hundred eighty-nine".