16983985 has 8 divisors (see below), whose sum is σ = 20405736. Its totient is φ = 13570560.

The previous prime is 16983983. The next prime is 16983991. The reversal of 16983985 is 58938961.

It can be written as a sum of positive squares in 4 ways, for example, as 2053489 + 14930496 = 1433^2 + 3864^2 .

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

It is not a de Polignac number, because 16983985 - 2¹ = 16983983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16983983) 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 7 ways as a sum of consecutive naturals, for example, 4065 + ... + 7105.

It is an arithmetic number, because the mean of its divisors is an integer number (2550717).

Almost surely, 2^16983985 is an apocalyptic number.

It is an amenable number.

16983985 is a deficient number, since it is larger than the sum of its proper divisors (3421751).

16983985 is a wasteful number, since it uses less digits than its factorization.

16983985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4163.

The product of its digits is 466560, while the sum is 49.

The square root of 16983985 is about 4121.1630639906. The cubic root of 16983985 is about 257.0473904139.

The spelling of 16983985 in words is "sixteen million, nine hundred eighty-three thousand, nine hundred eighty-five".