13875579 has 6 divisors (see below), whose sum is σ = 20042516. Its totient is φ = 9250380.

The previous prime is 13875557. The next prime is 13875581. The reversal of 13875579 is 97557831.

13875579 is a `hidden beast` number, since 1 + 3 + 8 + 75 + 579 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-13875579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13875539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 770857 + ... + 770874.

Almost surely, 2^13875579 is an apocalyptic number.

13875579 is a deficient number, since it is larger than the sum of its proper divisors (6166937).

13875579 is a wasteful number, since it uses less digits than its factorization.

13875579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541737 (or 1541734 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 13875579 is about 3724.9938254982. The cubic root of 13875579 is about 240.2981191175.

The spelling of 13875579 in words is "thirteen million, eight hundred seventy-five thousand, five hundred seventy-nine".