684573998 has 12 divisors (see below), whose sum is σ = 1041136488. Its totient is φ = 337592880.

The previous prime is 684573997. The next prime is 684574013. The reversal of 684573998 is 899375486.

684573998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684573997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21458 + ... + 42773.

It is an arithmetic number, because the mean of its divisors is an integer number (86761374).

Almost surely, 2^684573998 is an apocalyptic number.

684573998 is a deficient number, since it is larger than the sum of its proper divisors (356562490).

684573998 is an equidigital number, since it uses as much as digits as its factorization.

684573998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64379 (or 64306 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 59.

The square root of 684573998 is about 26164.3650410248. The cubic root of 684573998 is about 881.3332055769. Note that the first 3 decimals are identical.

The spelling of 684573998 in words is "six hundred eighty-four million, five hundred seventy-three thousand, nine hundred ninety-eight".