904999 has 2 divisors, whose sum is σ = 905000. Its totient is φ = 904998.

The previous prime is 904997. The next prime is 905011. The reversal of 904999 is 999409.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 904999 - 2¹ = 904997 is a prime.

Together with 904997, it forms a pair of twin primes.

904999 is a modest number, since divided by 999 gives 904 as remainder.

904999 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (904997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452499 + 452500.

It is an arithmetic number, because the mean of its divisors is an integer number (452500).

2⁹⁰⁴⁹⁹⁹ is an apocalyptic number.

904999 is a deficient number, since it is larger than the sum of its proper divisors (1).

904999 is an equidigital number, since it uses as much as digits as its factorization.

904999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 904999 is about 951.3143539335. The cubic root of 904999 is about 96.7273670815.

The spelling of 904999 in words is "nine hundred four thousand, nine hundred ninety-nine".