13924809 has 6 divisors (see below), whose sum is σ = 20113626. Its totient is φ = 9283200.

The previous prime is 13924787. The next prime is 13924829. The reversal of 13924809 is 90842931.

It can be written as a sum of positive squares in only one way, i.e., 12110400 + 1814409 = 3480^2 + 1347^2 .

It is not a de Polignac number, because 13924809 - 2⁷ = 13924681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13924829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 773592 + ... + 773609.

It is an arithmetic number, because the mean of its divisors is an integer number (3352271).

Almost surely, 2^13924809 is an apocalyptic number.

It is an amenable number.

13924809 is a deficient number, since it is larger than the sum of its proper divisors (6188817).

13924809 is a wasteful number, since it uses less digits than its factorization.

13924809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547207 (or 1547204 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 13924809 is about 3731.5960392304. The cubic root of 13924809 is about 240.5819730567.

The spelling of 13924809 in words is "thirteen million, nine hundred twenty-four thousand, eight hundred nine".