13824999 has 12 divisors (see below), whose sum is σ = 20709416. Its totient is φ = 9216504.

The previous prime is 13824991. The next prime is 13825033. The reversal of 13824999 is 99942831.

It is not a de Polignac number, because 13824999 - 2³ = 13824991 is a prime.

It is a super-2 number, since 2×13824999² = 382261194700002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13824991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28204 + ... + 28689.

Almost surely, 2^13824999 is an apocalyptic number.

13824999 is a deficient number, since it is larger than the sum of its proper divisors (6884417).

13824999 is an frugal number, since it uses more digits than its factorization.

13824999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56908 (or 56896 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 13824999 is about 3718.1983540419. The cubic root of 13824999 is about 240.0057811107.

The spelling of 13824999 in words is "thirteen million, eight hundred twenty-four thousand, nine hundred ninety-nine".