13899549 has 4 divisors (see below), whose sum is σ = 18532736. Its totient is φ = 9266364.

The previous prime is 13899547. The next prime is 13899551. The reversal of 13899549 is 94599831.

13899549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (13899547) and next prime (13899551).

It is not a de Polignac number, because 13899549 - 2¹ = 13899547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13899498 and 13899507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13899547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2316589 + ... + 2316594.

It is an arithmetic number, because the mean of its divisors is an integer number (4633184).

Almost surely, 2^13899549 is an apocalyptic number.

It is an amenable number.

13899549 is a deficient number, since it is larger than the sum of its proper divisors (4633187).

13899549 is an equidigital number, since it uses as much as digits as its factorization.

13899549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4633186.

The product of its digits is 349920, while the sum is 48.

The square root of 13899549 is about 3728.2098921600. The cubic root of 13899549 is about 240.4364108201.

The spelling of 13899549 in words is "thirteen million, eight hundred ninety-nine thousand, five hundred forty-nine".