• 698 can be written using four 4's:

See also 113.

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698 has 4 divisors (see below), whose sum is σ = 1050. Its totient is φ = 348.

The previous prime is 691. The next prime is 701. The reversal of 698 is 896.

698 is nontrivially palindromic in base 4 and base 11.

698 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 can be written as a sum of positive squares in only one way, i.e., 529 + 169 = 23^2 + 13^2 .

It is an alternating number because its digits alternate between even and odd.

698 is an undulating number in base 11.

698 is strictly pandigital in base 5.

It is a plaindrome in base 14.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173 + ... + 176.

698 is a deficient number, since it is larger than the sum of its proper divisors (352).

698 is a wasteful number, since it uses less digits than its factorization.

698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

The product of its digits is 432, while the sum is 23.

The square root of 698 is about 26.4196896272. The cubic root of 698 is about 8.8705757225.

It can be divided in two parts, 69 and 8, that added together give a palindrome (77).

The spelling of 698 in words is "six hundred ninety-eight", and thus it is an aban number and an oban number.