13209899 has 4 divisors (see below), whose sum is σ = 13333464. Its totient is φ = 13086336.

The previous prime is 13209881. The next prime is 13209919. The reversal of 13209899 is 99890231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99890231 = 7 ⋅14270033.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13209899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13209829) 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, 61622 + ... + 61835.

It is an arithmetic number, because the mean of its divisors is an integer number (3333366).

Almost surely, 2^13209899 is an apocalyptic number.

13209899 is a deficient number, since it is larger than the sum of its proper divisors (123565).

13209899 is a wasteful number, since it uses less digits than its factorization.

13209899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123564.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 13209899 is about 3634.5424746452. The cubic root of 13209899 is about 236.3922126513.

The spelling of 13209899 in words is "thirteen million, two hundred nine thousand, eight hundred ninety-nine".