13857899 has 8 divisors (see below), whose sum is σ = 15605760. Its totient is φ = 12191400.

The previous prime is 13857887. The next prime is 13857901. The reversal of 13857899 is 99875831.

13857899 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13857899 is a prime.

It is a super-4 number, since 4×13857899⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13857829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19979 + ... + 20660.

It is an arithmetic number, because the mean of its divisors is an integer number (1950720).

Almost surely, 2^13857899 is an apocalyptic number.

13857899 is a deficient number, since it is larger than the sum of its proper divisors (1747861).

13857899 is a wasteful number, since it uses less digits than its factorization.

13857899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40681.

The product of its digits is 544320, while the sum is 50.

The square root of 13857899 is about 3722.6199107618. The cubic root of 13857899 is about 240.1960146344.

The spelling of 13857899 in words is "thirteen million, eight hundred fifty-seven thousand, eight hundred ninety-nine".