493818394 has 4 divisors (see below), whose sum is σ = 740727594. Its totient is φ = 246909196.

The previous prime is 493818389. The next prime is 493818421.

493818394 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in only one way, i.e., 483340225 + 10478169 = 21985^2 + 3237^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123454597 + ... + 123454600.

Almost surely, 2^493818394 is an apocalyptic number.

493818394 is a deficient number, since it is larger than the sum of its proper divisors (246909200).

493818394 is a wasteful number, since it uses less digits than its factorization.

493818394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246909199.

The product of its digits is 746496, while the sum is 49.

The square root of 493818394 is about 22222.0249752357. The cubic root of 493818394 is about 790.4160570810.

It can be divided in two parts, 49381 and 8394, that added together give a palindrome (57775).

The spelling of 493818394 in words is "four hundred ninety-three million, eight hundred eighteen thousand, three hundred ninety-four".