494405999 has 4 divisors (see below), whose sum is σ = 515901936. Its totient is φ = 472910064.

The previous prime is 494405987. The next prime is 494406013. The reversal of 494405999 is 999504494.

It is a happy number.

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 494405999 - 2²⁸ = 225970543 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 494405999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494405969) 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, 10747934 + ... + 10747979.

It is an arithmetic number, because the mean of its divisors is an integer number (128975484).

Almost surely, 2^494405999 is an apocalyptic number.

494405999 is a deficient number, since it is larger than the sum of its proper divisors (21495937).

494405999 is a wasteful number, since it uses less digits than its factorization.

494405999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21495936.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The square root of 494405999 is about 22235.2422743716. The cubic root of 494405999 is about 790.7294437659.

The spelling of 494405999 in words is "four hundred ninety-four million, four hundred five thousand, nine hundred ninety-nine".