• 694 can be written using four 4's:
It is a happy number.
694 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes.
It is an alternating number because its digits alternate between even and odd.
694 is strictly pandigital in base 5.
It is a plaindrome in base 8, base 12 and base 14.
It is a nialpdrome in base 9.
It is a congruent number.
694 is the 22-nd centered triangular number.
694 is a wasteful number, since it uses less digits than its factorization.
694 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 349.
The square root of 694 is about 26.3438797446. The cubic root of 694 is about 8.8535985026.
The spelling of 694 in words is "six hundred ninety-four", and thus it is an aban number.