13875999 has 16 divisors (see below), whose sum is σ = 19471200. Its totient is φ = 8778240.

The previous prime is 13875989. The next prime is 13876001. The reversal of 13875999 is 99957831.

It is a happy number.

It is not a de Polignac number, because 13875999 - 2¹³ = 13867807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13875919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3027 + ... + 6075.

It is an arithmetic number, because the mean of its divisors is an integer number (1216950).

Almost surely, 2^13875999 is an apocalyptic number.

13875999 is a deficient number, since it is larger than the sum of its proper divisors (5595201).

13875999 is a wasteful number, since it uses less digits than its factorization.

13875999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130.

The product of its digits is 612360, while the sum is 51.

The square root of 13875999 is about 3725.0502010040. The cubic root of 13875999 is about 240.3005436215.

The spelling of 13875999 in words is "thirteen million, eight hundred seventy-five thousand, nine hundred ninety-nine".