13478891473 has 4 divisors (see below), whose sum is σ = 14271767460. Its totient is φ = 12686015488.

The previous prime is 13478891467. The next prime is 13478891483. The reversal of 13478891473 is 37419887431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37419887431 = 191 ⋅195915641.

It can be written as a sum of positive squares in 2 ways, for example, as 12180874689 + 1298016784 = 110367^2 + 36028^2 .

It is a cyclic number.

It is not a de Polignac number, because 13478891473 - 2¹³ = 13478883281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13478891423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396437968 + ... + 396438001.

It is an arithmetic number, because the mean of its divisors is an integer number (3567941865).

Almost surely, 2^13478891473 is an apocalyptic number.

It is an amenable number.

13478891473 is a deficient number, since it is larger than the sum of its proper divisors (792875987).

13478891473 is an equidigital number, since it uses as much as digits as its factorization.

13478891473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792875986.

The product of its digits is 4064256, while the sum is 55.

The spelling of 13478891473 in words is "thirteen billion, four hundred seventy-eight million, eight hundred ninety-one thousand, four hundred seventy-three".