698218 has 4 divisors (see below), whose sum is σ = 1047330. Its totient is φ = 349108.

The previous prime is 698183. The next prime is 698239. The reversal of 698218 is 812896.

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., 660969 + 37249 = 813^2 + 193^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174553 + ... + 174556.

2⁶⁹⁸²¹⁸ is an apocalyptic number.

698218 is a deficient number, since it is larger than the sum of its proper divisors (349112).

698218 is a wasteful number, since it uses less digits than its factorization.

698218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349111.

The product of its digits is 6912, while the sum is 34.

The square root of 698218 is about 835.5943992153. The cubic root of 698218 is about 88.7149911514.

The spelling of 698218 in words is "six hundred ninety-eight thousand, two hundred eighteen".