13138479 has 24 divisors (see below), whose sum is σ = 19936800. Its totient is φ = 8326080.

The previous prime is 13138471. The next prime is 13138487. The reversal of 13138479 is 97483131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13138471) and next prime (13138487).

It is not a de Polignac number, because 13138479 - 2³ = 13138471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13138471) 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 23 ways as a sum of consecutive naturals, for example, 18177 + ... + 18885.

It is an arithmetic number, because the mean of its divisors is an integer number (830700).

Almost surely, 2^13138479 is an apocalyptic number.

13138479 is a deficient number, since it is larger than the sum of its proper divisors (6798321).

13138479 is a wasteful number, since it uses less digits than its factorization.

13138479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815 (or 812 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 13138479 is about 3624.7039879140. The cubic root of 13138479 is about 235.9654203381.

The spelling of 13138479 in words is "thirteen million, one hundred thirty-eight thousand, four hundred seventy-nine".