493973839 has 4 divisors (see below), whose sum is σ = 496131160. Its totient is φ = 491816520.

The previous prime is 493973803. The next prime is 493973861. The reversal of 493973839 is 938379394.

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

It is a cyclic number.

It is not a de Polignac number, because 493973839 - 2¹¹ = 493971791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 493973839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493973869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1078317 + ... + 1078774.

It is an arithmetic number, because the mean of its divisors is an integer number (124032790).

Almost surely, 2^493973839 is an apocalyptic number.

493973839 is a deficient number, since it is larger than the sum of its proper divisors (2157321).

493973839 is a wasteful number, since it uses less digits than its factorization.

493973839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157320.

The product of its digits is 4408992, while the sum is 55.

The square root of 493973839 is about 22225.5222435829. The cubic root of 493973839 is about 790.4989845537.

The spelling of 493973839 in words is "four hundred ninety-three million, nine hundred seventy-three thousand, eight hundred thirty-nine".