13899109 has 4 divisors (see below), whose sum is σ = 15884704. Its totient is φ = 11913516.

The previous prime is 13899079. The next prime is 13899131. The reversal of 13899109 is 90199831.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90199831 = 29 ⋅3110339.

It is a cyclic number.

It is not a de Polignac number, because 13899109 - 2⁵ = 13899077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13899209) 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 3 ways as a sum of consecutive naturals, for example, 992787 + ... + 992800.

It is an arithmetic number, because the mean of its divisors is an integer number (3971176).

Almost surely, 2^13899109 is an apocalyptic number.

It is an amenable number.

13899109 is a deficient number, since it is larger than the sum of its proper divisors (1985595).

13899109 is an equidigital number, since it uses as much as digits as its factorization.

13899109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985594.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 13899109 is about 3728.1508821398. The cubic root of 13899109 is about 240.4338737321.

The spelling of 13899109 in words is "thirteen million, eight hundred ninety-nine thousand, one hundred nine".