13809347 has 4 divisors (see below), whose sum is σ = 13860576. Its totient is φ = 13758120.

The previous prime is 13809331. The next prime is 13809359. The reversal of 13809347 is 74390831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13809347 - 2⁴ = 13809331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13809377) 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 3 ways as a sum of consecutive naturals, for example, 25208 + ... + 25749.

It is an arithmetic number, because the mean of its divisors is an integer number (3465144).

Almost surely, 2^13809347 is an apocalyptic number.

13809347 is a deficient number, since it is larger than the sum of its proper divisors (51229).

13809347 is an equidigital number, since it uses as much as digits as its factorization.

13809347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51228.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 13809347 is about 3716.0929751555. The cubic root of 13809347 is about 239.9151725678.

The spelling of 13809347 in words is "thirteen million, eight hundred nine thousand, three hundred forty-seven".