13478813 has 4 divisors (see below), whose sum is σ = 13512828. Its totient is φ = 13444800.

The previous prime is 13478797. The next prime is 13478833. The reversal of 13478813 is 31887431.

13478813 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31887431 = 383 ⋅83257.

It can be written as a sum of positive squares in 2 ways, for example, as 9406489 + 4072324 = 3067^2 + 2018^2 .

It is a cyclic number.

It is not a de Polignac number, because 13478813 - 2⁴ = 13478797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13478833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16406 + ... + 17207.

It is an arithmetic number, because the mean of its divisors is an integer number (3378207).

Almost surely, 2^13478813 is an apocalyptic number.

It is an amenable number.

13478813 is a deficient number, since it is larger than the sum of its proper divisors (34015).

13478813 is an equidigital number, since it uses as much as digits as its factorization.

13478813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34014.

The product of its digits is 16128, while the sum is 35.

The square root of 13478813 is about 3671.3502965530. The cubic root of 13478813 is about 237.9855286260.

The spelling of 13478813 in words is "thirteen million, four hundred seventy-eight thousand, eight hundred thirteen".