493821605 has 4 divisors (see below), whose sum is σ = 592585932. Its totient is φ = 395057280.

The previous prime is 493821583. The next prime is 493821607. The reversal of 493821605 is 506128394.

It is a happy number.

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 95140516 + 398681089 = 9754^2 + 19967^2 .

It is not a de Polignac number, because 493821605 - 2²⁸ = 225386149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493821607) 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, 49382156 + ... + 49382165.

It is an arithmetic number, because the mean of its divisors is an integer number (148146483).

Almost surely, 2^493821605 is an apocalyptic number.

It is an amenable number.

493821605 is a deficient number, since it is larger than the sum of its proper divisors (98764327).

493821605 is an equidigital number, since it uses as much as digits as its factorization.

493821605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98764326.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 493821605 is about 22222.0972232596. The cubic root of 493821605 is about 790.4177702752.

Adding to 493821605 its reverse (506128394), we get a palindrome (999949999).

The spelling of 493821605 in words is "four hundred ninety-three million, eight hundred twenty-one thousand, six hundred five".