698985 has 36 divisors (see below), whose sum is σ = 1413828. Its totient is φ = 318528.

The previous prime is 698983. The next prime is 699001. The reversal of 698985 is 589896.

698985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 127449 + 571536 = 357^2 + 756^2 .

It is not a de Polignac number, because 698985 - 2¹ = 698983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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

698985 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 698985.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 698985.

It is not an unprimeable number, because it can be changed into a prime (698983) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2047 + ... + 2363.

It is an arithmetic number, because the mean of its divisors is an integer number (39273).

2⁶⁹⁸⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

698985 is an abundant number, since it is smaller than the sum of its proper divisors (714843).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

698985 is a wasteful number, since it uses less digits than its factorization.

698985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 332 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 698985 is about 836.0532279706. The cubic root of 698985 is about 88.7474640550.

The spelling of 698985 in words is "six hundred ninety-eight thousand, nine hundred eighty-five".