493109639 has 4 divisors (see below), whose sum is σ = 537937800. Its totient is φ = 448281480.

The previous prime is 493109621. The next prime is 493109651. The reversal of 493109639 is 936901394.

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 493109639 - 2¹⁶ = 493044103 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 493109639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493108639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22414064 + ... + 22414085.

It is an arithmetic number, because the mean of its divisors is an integer number (134484450).

Almost surely, 2^493109639 is an apocalyptic number.

493109639 is a deficient number, since it is larger than the sum of its proper divisors (44828161).

493109639 is a wasteful number, since it uses less digits than its factorization.

493109639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44828160.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 493109639 is about 22206.0721200306. The cubic root of 493109639 is about 790.0377266606.

The spelling of 493109639 in words is "four hundred ninety-three million, one hundred nine thousand, six hundred thirty-nine".