13878433 has 4 divisors (see below), whose sum is σ = 13987840. Its totient is φ = 13769028.

The previous prime is 13878427. The next prime is 13878439. The reversal of 13878433 is 33487831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (13878427) and next prime (13878439).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13878433 is a prime.

It is a super-2 number, since 2×13878433² = 385221805070978, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13878392 and 13878401.

It is not an unprimeable number, because it can be changed into a prime (13878439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54513 + ... + 54766.

It is an arithmetic number, because the mean of its divisors is an integer number (3496960).

Almost surely, 2^13878433 is an apocalyptic number.

It is an amenable number.

13878433 is a deficient number, since it is larger than the sum of its proper divisors (109407).

13878433 is a wasteful number, since it uses less digits than its factorization.

13878433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109406.

The product of its digits is 48384, while the sum is 37.

The square root of 13878433 is about 3725.3768936847. The cubic root of 13878433 is about 240.3145932364.

The spelling of 13878433 in words is "thirteen million, eight hundred seventy-eight thousand, four hundred thirty-three".