493147289 has 4 divisors (see below), whose sum is σ = 493219620. Its totient is φ = 493074960.

The previous prime is 493147279. The next prime is 493147307. The reversal of 493147289 is 982741394.

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 432432025 + 60715264 = 20795^2 + 7792^2 .

It is a cyclic number.

It is not a de Polignac number, because 493147289 - 2¹² = 493143193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (493147219) 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, 24734 + ... + 39975.

It is an arithmetic number, because the mean of its divisors is an integer number (123304905).

Almost surely, 2^493147289 is an apocalyptic number.

It is an amenable number.

493147289 is a deficient number, since it is larger than the sum of its proper divisors (72331).

493147289 is an equidigital number, since it uses as much as digits as its factorization.

493147289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72330.

The product of its digits is 435456, while the sum is 47.

The square root of 493147289 is about 22206.9198449492. The cubic root of 493147289 is about 790.0578331853.

The spelling of 493147289 in words is "four hundred ninety-three million, one hundred forty-seven thousand, two hundred eighty-nine".