13918869 has 24 divisors (see below), whose sum is σ = 22028760. Its totient is φ = 8429568.

The previous prime is 13918843. The next prime is 13918871. The reversal of 13918869 is 96881931.

It can be written as a sum of positive squares in 4 ways, for example, as 8910225 + 5008644 = 2985^2 + 2238^2 .

It is not a de Polignac number, because 13918869 - 2⁷ = 13918741 is a prime.

It is a super-2 number, since 2×13918869² = 387469828478322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13918889) 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 23 ways as a sum of consecutive naturals, for example, 2869 + ... + 6005.

It is an arithmetic number, because the mean of its divisors is an integer number (917865).

Almost surely, 2^13918869 is an apocalyptic number.

It is an amenable number.

13918869 is a deficient number, since it is larger than the sum of its proper divisors (8109891).

13918869 is a wasteful number, since it uses less digits than its factorization.

13918869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189 (or 3186 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 13918869 is about 3730.8000482470. The cubic root of 13918869 is about 240.5477592979.

The spelling of 13918869 in words is "thirteen million, nine hundred eighteen thousand, eight hundred sixty-nine".