43749994 has 4 divisors (see below), whose sum is σ = 65624994. Its totient is φ = 21874996.

The previous prime is 43749973. The next prime is 43750013. The reversal of 43749994 is 49994734.

43749994 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 can be written as a sum of positive squares in only one way, i.e., 43731769 + 18225 = 6613^2 + 135^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10937497 + ... + 10937500.

Almost surely, 2^43749994 is an apocalyptic number.

43749994 is a deficient number, since it is larger than the sum of its proper divisors (21875000).

43749994 is a wasteful number, since it uses less digits than its factorization.

43749994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21874999.

The product of its digits is 979776, while the sum is 49.

The square root of 43749994 is about 6614.3778241041. The cubic root of 43749994 is about 352.3649204951.

The spelling of 43749994 in words is "forty-three million, seven hundred forty-nine thousand, nine hundred ninety-four".