494720839 has 4 divisors (see below), whose sum is σ = 495029920. Its totient is φ = 494411760.

The previous prime is 494720833. The next prime is 494720843. The reversal of 494720839 is 938027494.

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 494720839 - 2⁷ = 494720711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494720833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152127 + ... + 155344.

It is an arithmetic number, because the mean of its divisors is an integer number (123757480).

Almost surely, 2^494720839 is an apocalyptic number.

494720839 is a deficient number, since it is larger than the sum of its proper divisors (309081).

494720839 is a wasteful number, since it uses less digits than its factorization.

494720839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309080.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 494720839 is about 22242.3208995824. The cubic root of 494720839 is about 790.8972548580.

The spelling of 494720839 in words is "four hundred ninety-four million, seven hundred twenty thousand, eight hundred thirty-nine".