16869789 has 28 divisors (see below), whose sum is σ = 25720476. Its totient is φ = 11057472.

The previous prime is 16869779. The next prime is 16869799. The reversal of 16869789 is 98796861.

It is an interprime number because it is at equal distance from previous prime (16869779) and next prime (16869799).

It can be written as a sum of positive squares in 2 ways, for example, as 4549689 + 12320100 = 2133^2 + 3510^2 .

It is not a de Polignac number, because 16869789 - 2⁸ = 16869533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16869709) 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 27 ways as a sum of consecutive naturals, for example, 53059 + ... + 53375.

Almost surely, 2^16869789 is an apocalyptic number.

It is an amenable number.

16869789 is a deficient number, since it is larger than the sum of its proper divisors (8850687).

16869789 is an frugal number, since it uses more digits than its factorization.

16869789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 393 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 16869789 is about 4107.2848695945. The cubic root of 16869789 is about 256.4699872548.

The spelling of 16869789 in words is "sixteen million, eight hundred sixty-nine thousand, seven hundred eighty-nine".