13856291 has 4 divisors (see below), whose sum is σ = 13993584. Its totient is φ = 13719000.

The previous prime is 13856279. The next prime is 13856299. The reversal of 13856291 is 19265831.

13856291 = T₁₃₈ + T₁₃₉ + ... + T₄₄₀.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13856291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13856299) 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, 68495 + ... + 68696.

It is an arithmetic number, because the mean of its divisors is an integer number (3498396).

Almost surely, 2^13856291 is an apocalyptic number.

13856291 is a deficient number, since it is larger than the sum of its proper divisors (137293).

13856291 is a wasteful number, since it uses less digits than its factorization.

13856291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137292.

The product of its digits is 12960, while the sum is 35.

The square root of 13856291 is about 3722.4039275715. The cubic root of 13856291 is about 240.1867239011.

The spelling of 13856291 in words is "thirteen million, eight hundred fifty-six thousand, two hundred ninety-one".