13859971 has 4 divisors (see below), whose sum is σ = 14154912. Its totient is φ = 13565032.

The previous prime is 13859933. The next prime is 13859983. The reversal of 13859971 is 17995831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13859971 - 2¹⁷ = 13728899 is a prime.

It is a super-2 number, since 2×13859971² = 384197592241682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13859171) 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 3 ways as a sum of consecutive naturals, for example, 147400 + ... + 147493.

It is an arithmetic number, because the mean of its divisors is an integer number (3538728).

Almost surely, 2^13859971 is an apocalyptic number.

13859971 is a deficient number, since it is larger than the sum of its proper divisors (294941).

13859971 is an equidigital number, since it uses as much as digits as its factorization.

13859971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294940.

The product of its digits is 68040, while the sum is 43.

The square root of 13859971 is about 3722.8981989842. The cubic root of 13859971 is about 240.2079852162.

The spelling of 13859971 in words is "thirteen million, eight hundred fifty-nine thousand, nine hundred seventy-one".