43989799 has 6 divisors (see below), whose sum is σ = 51171864. Its totient is φ = 37705500.

The previous prime is 43989793. The next prime is 43989851. The reversal of 43989799 is 99798934.

It is not a de Polignac number, because 43989799 - 2⁵ = 43989767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43989793) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 448827 + ... + 448924.

It is an arithmetic number, because the mean of its divisors is an integer number (8528644).

Almost surely, 2^43989799 is an apocalyptic number.

43989799 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

43989799 is a deficient number, since it is larger than the sum of its proper divisors (7182065).

43989799 is an equidigital number, since it uses as much as digits as its factorization.

43989799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897765 (or 897758 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 58.

The square root of 43989799 is about 6632.4806068318. The cubic root of 43989799 is about 353.0075487850.

The spelling of 43989799 in words is "forty-three million, nine hundred eighty-nine thousand, seven hundred ninety-nine".