43868819 has 4 divisors (see below), whose sum is σ = 43899696. Its totient is φ = 43837944.

The previous prime is 43868807. The next prime is 43868827. The reversal of 43868819 is 91886834.

43868819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-43868819 is a prime.

It is a super-2 number, since 2×43868819² = 3848946560909522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43868849) 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, 13199 + ... + 16184.

It is an arithmetic number, because the mean of its divisors is an integer number (10974924).

Almost surely, 2^43868819 is an apocalyptic number.

43868819 is a deficient number, since it is larger than the sum of its proper divisors (30877).

43868819 is a wasteful number, since it uses less digits than its factorization.

43868819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30876.

The product of its digits is 331776, while the sum is 47.

The square root of 43868819 is about 6623.3540596891. The cubic root of 43868819 is about 352.6836398735.

The spelling of 43868819 in words is "forty-three million, eight hundred sixty-eight thousand, eight hundred nineteen".