1698898985 has 16 divisors (see below), whose sum is σ = 2336535936. Its totient is φ = 1161650688.

The previous prime is 1698898973. The next prime is 1698899021. The reversal of 1698898985 is 5898988961.

It is a cyclic number.

It is not a de Polignac number, because 1698898985 - 2¹⁰ = 1698897961 is a prime.

It is a super-2 number, since 2×1698898985² = 5772515522468060450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56399 + ... + 81108.

It is an arithmetic number, because the mean of its divisors is an integer number (146033496).

Almost surely, 2^1698898985 is an apocalyptic number.

It is an amenable number.

1698898985 is a deficient number, since it is larger than the sum of its proper divisors (637636951).

1698898985 is a wasteful number, since it uses less digits than its factorization.

1698898985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137872.

The product of its digits is 89579520, while the sum is 71.

The square root of 1698898985 is about 41217.7023255785. The cubic root of 1698898985 is about 1193.2254808134.

The spelling of 1698898985 in words is "one billion, six hundred ninety-eight million, eight hundred ninety-eight thousand, nine hundred eighty-five".