• 674 can be written using four 4's:
674 has 4 divisors (see below), whose sum is σ = 1014. Its totient is φ = 336.
The previous prime is 673. The next prime is 677. The reversal of 674 is 476.
674 is nontrivially palindromic in base 9 and base 16.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in only one way, i.e., 625 + 49 = 25^2 + 7^2 .
It is an alternating number because its digits alternate between even and odd.
674 is an undulating number in base 9 and base 16.
It is a plaindrome in base 15.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (673) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167 + ... + 170.
674 is a deficient number, since it is larger than the sum of its proper divisors (340).
674 is a wasteful number, since it uses less digits than its factorization.
674 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 339.
The product of its digits is 168, while the sum is 17.
The square root of 674 is about 25.9615099715. The cubic root of 674 is about 8.7677191955.
It can be divided in two parts, 6 and 74, that multiplied together give a palindrome (444).
The spelling of 674 in words is "six hundred seventy-four", and thus it is an aban number.
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