It is a congruent number.
It is an unprimeable number.
699904 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2699904 is an apocalyptic number.
699904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.
It is an amenable number.
699904 is an equidigital number, since it uses as much as digits as its factorization.
699904 is an odious number, because the sum of its binary digits is odd.
The square root of 699904 is about 836.6026535937. The cubic root of 699904 is about 88.7863409990.
The spelling of 699904 in words is "six hundred ninety-nine thousand, nine hundred four".