494235809 has 4 divisors (see below), whose sum is σ = 520248240. Its totient is φ = 468223380.

The previous prime is 494235793. The next prime is 494235829. The reversal of 494235809 is 908532494.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 908532494 = 2 ⋅454266247.

It is a cyclic number.

It is not a de Polignac number, because 494235809 - 2⁴ = 494235793 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 494235809.

It is not an unprimeable number, because it can be changed into a prime (494235829) 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, 13006187 + ... + 13006224.

It is an arithmetic number, because the mean of its divisors is an integer number (130062060).

Almost surely, 2^494235809 is an apocalyptic number.

It is an amenable number.

494235809 is a deficient number, since it is larger than the sum of its proper divisors (26012431).

494235809 is a wasteful number, since it uses less digits than its factorization.

494235809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26012430.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 494235809 is about 22231.4149122362. The cubic root of 494235809 is about 790.6387020888.

The spelling of 494235809 in words is "four hundred ninety-four million, two hundred thirty-five thousand, eight hundred nine".