1698942985 has 8 divisors (see below), whose sum is σ = 2047635720. Its totient is φ = 1353218304.

The previous prime is 1698942913. The next prime is 1698943013. The reversal of 1698942985 is 5892498961.

It can be written as a sum of positive squares in 4 ways, for example, as 1094815744 + 604127241 = 33088^2 + 24579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1698942985 - 2⁹ = 1698942473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740752 + ... + 743041.

It is an arithmetic number, because the mean of its divisors is an integer number (255954465).

Almost surely, 2^1698942985 is an apocalyptic number.

It is an amenable number.

1698942985 is a deficient number, since it is larger than the sum of its proper divisors (348692735).

1698942985 is a wasteful number, since it uses less digits than its factorization.

1698942985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484027.

The product of its digits is 11197440, while the sum is 61.

The square root of 1698942985 is about 41218.2360733693. The cubic root of 1698942985 is about 1193.2357818904.

The spelling of 1698942985 in words is "one billion, six hundred ninety-eight million, nine hundred forty-two thousand, nine hundred eighty-five".