904994839 has 4 divisors (see below), whose sum is σ = 1034279824. Its totient is φ = 775709856.

The previous prime is 904994837. The next prime is 904994903. The reversal of 904994839 is 938499409.

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 904994839 - 2¹ = 904994837 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 904994839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904994837) 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, 64642482 + ... + 64642495.

It is an arithmetic number, because the mean of its divisors is an integer number (258569956).

Almost surely, 2^904994839 is an apocalyptic number.

904994839 is a deficient number, since it is larger than the sum of its proper divisors (129284985).

904994839 is a wasteful number, since it uses less digits than its factorization.

904994839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129284984.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 904994839 is about 30083.1321341379. The cubic root of 904994839 is about 967.2721883710.

The spelling of 904994839 in words is "nine hundred four million, nine hundred ninety-four thousand, eight hundred thirty-nine".