13870013857 has 4 divisors (see below), whose sum is σ = 15851444416. Its totient is φ = 11888583300.

The previous prime is 13870013837. The next prime is 13870013867. The reversal of 13870013857 is 75831007831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13870013857 - 2²³ = 13861625249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13870013827) 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, 990715269 + ... + 990715282.

It is an arithmetic number, because the mean of its divisors is an integer number (3962861104).

Almost surely, 2^13870013857 is an apocalyptic number.

It is an amenable number.

13870013857 is a deficient number, since it is larger than the sum of its proper divisors (1981430559).

13870013857 is an equidigital number, since it uses as much as digits as its factorization.

13870013857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981430558.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 13870013857 in words is "thirteen billion, eight hundred seventy million, thirteen thousand, eight hundred fifty-seven".