16869969 has 6 divisors (see below), whose sum is σ = 24367746. Its totient is φ = 11246640.

The previous prime is 16869947. The next prime is 16869989. The reversal of 16869969 is 96996861.

It can be written as a sum of positive squares in only one way, i.e., 16524225 + 345744 = 4065^2 + 588^2 .

It is not a de Polignac number, because 16869969 - 2¹³ = 16861777 is a prime.

It is a super-2 number, since 2×16869969² = 569191708121922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16869989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 937212 + ... + 937229.

It is an arithmetic number, because the mean of its divisors is an integer number (4061291).

Almost surely, 2^16869969 is an apocalyptic number.

It is an amenable number.

16869969 is a deficient number, since it is larger than the sum of its proper divisors (7497777).

16869969 is a wasteful number, since it uses less digits than its factorization.

16869969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874447 (or 1874444 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 16869969 is about 4107.3067818219. The cubic root of 16869969 is about 256.4708994265.

The spelling of 16869969 in words is "sixteen million, eight hundred sixty-nine thousand, nine hundred sixty-nine".