13403865 has 8 divisors (see below), whose sum is σ = 21446208. Its totient is φ = 7148720.

The previous prime is 13403849. The next prime is 13403869. The reversal of 13403865 is 56830431.

13403865 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13403865 - 2⁴ = 13403849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13403869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446781 + ... + 446810.

It is an arithmetic number, because the mean of its divisors is an integer number (2680776).

Almost surely, 2^13403865 is an apocalyptic number.

13403865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13403865 is a deficient number, since it is larger than the sum of its proper divisors (8042343).

13403865 is an equidigital number, since it uses as much as digits as its factorization.

13403865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893599.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 13403865 is about 3661.1289242527. The cubic root of 13403865 is about 237.5436078744.

The spelling of 13403865 in words is "thirteen million, four hundred three thousand, eight hundred sixty-five".