13865867 has 4 divisors (see below), whose sum is σ = 13942656. Its totient is φ = 13789080.

The previous prime is 13865833. The next prime is 13865879. The reversal of 13865867 is 76856831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76856831 = 4673 ⋅16447.

It is a cyclic number.

It is not a de Polignac number, because 13865867 - 2¹⁶ = 13800331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13862867) 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, 38123 + ... + 38484.

It is an arithmetic number, because the mean of its divisors is an integer number (3485664).

Almost surely, 2^13865867 is an apocalyptic number.

13865867 is a deficient number, since it is larger than the sum of its proper divisors (76789).

13865867 is an equidigital number, since it uses as much as digits as its factorization.

13865867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76788.

The product of its digits is 241920, while the sum is 44.

The square root of 13865867 is about 3723.6899709831. The cubic root of 13865867 is about 240.2420416968.

The spelling of 13865867 in words is "thirteen million, eight hundred sixty-five thousand, eight hundred sixty-seven".