699 has 4 divisors (see below), whose sum is σ = 936.
Its totient is φ = 464.
The previous prime is 691. The next prime is 701. The reversal of 699 is 996.
It can be divided in two parts, 69 and 9, that added together give a triangular number (78 = T12).
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 699 - 23 = 691 is a prime.
It is a D-number.
699 is a modest number, since divided by 99 gives 6 as remainder.
699 is a lucky number.
It is a plaindrome in base 10, base 14 and base 16.
It is not an unprimeable number, because it can be changed into a prime (691) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114 + ... + 119.
It is an arithmetic number, because the mean of its divisors is an integer number (234).
699 is a deficient number, since it is larger than the sum of its proper divisors (237).
699 is a wasteful number, since it uses less digits than its factorization.
699 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 236.
The product of its digits is 486, while the sum is 24.
The square root of 699 is about 26.4386081328.
The cubic root of 699 is about 8.8748098881.
The spelling of 699 in words is "six hundred ninety-nine", and thus it is an aban number and an oban number.