494979839 has 4 divisors (see below), whose sum is σ = 507052560. Its totient is φ = 482907120.

The previous prime is 494979829. The next prime is 494979857. The reversal of 494979839 is 938979494.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 938979494 = 2 ⋅469489747.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-494979839 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 (494979809) 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, 6036299 + ... + 6036380.

It is an arithmetic number, because the mean of its divisors is an integer number (126763140).

Almost surely, 2^494979839 is an apocalyptic number.

494979839 is a deficient number, since it is larger than the sum of its proper divisors (12072721).

494979839 is a wasteful number, since it uses less digits than its factorization.

494979839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12072720.

The product of its digits is 17635968, while the sum is 62.

The square root of 494979839 is about 22248.1423718925. The cubic root of 494979839 is about 791.0352496194.

The spelling of 494979839 in words is "four hundred ninety-four million, nine hundred seventy-nine thousand, eight hundred thirty-nine".