13855969 has 8 divisors (see below), whose sum is σ = 14705928. Its totient is φ = 13009920.

The previous prime is 13855951. The next prime is 13855979. The reversal of 13855969 is 96955831.

It can be written as a sum of positive squares in 4 ways, for example, as 3045025 + 10810944 = 1745^2 + 3288^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13855969 - 2⁷ = 13855841 is a prime.

It is a super-2 number, since 2×13855969² = 383975753857922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13855979) 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 7 ways as a sum of consecutive naturals, for example, 9829 + ... + 11149.

It is an arithmetic number, because the mean of its divisors is an integer number (1838241).

Almost surely, 2^13855969 is an apocalyptic number.

It is an amenable number.

13855969 is a deficient number, since it is larger than the sum of its proper divisors (849959).

13855969 is a wasteful number, since it uses less digits than its factorization.

13855969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955.

The product of its digits is 291600, while the sum is 46.

The square root of 13855969 is about 3722.3606757003. The cubic root of 13855969 is about 240.1848633569.

The spelling of 13855969 in words is "thirteen million, eight hundred fifty-five thousand, nine hundred sixty-nine".