13408899 has 32 divisors (see below), whose sum is σ = 21235200. Its totient is φ = 7521696.

The previous prime is 13408897. The next prime is 13408909. The reversal of 13408899 is 99880431.

13408899 = T₉₀ + T₉₁ + ... + T₄₃₂.

It is not a de Polignac number, because 13408899 - 2¹ = 13408897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13408899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13408891) 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 31 ways as a sum of consecutive naturals, for example, 85329 + ... + 85485.

It is an arithmetic number, because the mean of its divisors is an integer number (663600).

Almost surely, 2^13408899 is an apocalyptic number.

13408899 is a deficient number, since it is larger than the sum of its proper divisors (7826301).

13408899 is an equidigital number, since it uses as much as digits as its factorization.

13408899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 13408899 is about 3661.8163525770. The cubic root of 13408899 is about 237.5733417075.

The spelling of 13408899 in words is "thirteen million, four hundred eight thousand, eight hundred ninety-nine".