698189 has 4 divisors (see below), whose sum is σ = 715260. Its totient is φ = 681120.

The previous prime is 698183. The next prime is 698239. The reversal of 698189 is 981896.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 265225 + 432964 = 515^2 + 658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-698189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 17029 = 698189 / (6 + 9 + 8 + 1 + 8 + 9).

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698183) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 8474 + ... + 8555.

It is an arithmetic number, because the mean of its divisors is an integer number (178815).

2⁶⁹⁸¹⁸⁹ is an apocalyptic number.

It is an amenable number.

698189 is a deficient number, since it is larger than the sum of its proper divisors (17071).

698189 is a wasteful number, since it uses less digits than its factorization.

698189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17070.

The product of its digits is 31104, while the sum is 41.

The square root of 698189 is about 835.5770461184. The cubic root of 698189 is about 88.7137628958.

The spelling of 698189 in words is "six hundred ninety-eight thousand, one hundred eighty-nine".