13439805 has 8 divisors (see below), whose sum is σ = 21503712. Its totient is φ = 7167888.

The previous prime is 13439773. The next prime is 13439807. The reversal of 13439805 is 50893431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13439805 - 2⁵ = 13439773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13439807) 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 7 ways as a sum of consecutive naturals, for example, 447979 + ... + 448008.

It is an arithmetic number, because the mean of its divisors is an integer number (2687964).

Almost surely, 2^13439805 is an apocalyptic number.

13439805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13439805 is a deficient number, since it is larger than the sum of its proper divisors (8063907).

13439805 is an equidigital number, since it uses as much as digits as its factorization.

13439805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895995.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 13439805 is about 3666.0339605628. The cubic root of 13439805 is about 237.7557282391.

The spelling of 13439805 in words is "thirteen million, four hundred thirty-nine thousand, eight hundred five".