43739745 has 32 divisors (see below), whose sum is σ = 81304320. Its totient is φ = 19664640.

The previous prime is 43739741. The next prime is 43739771. The reversal of 43739745 is 54793734.

43739745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43739745 - 2² = 43739741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43739697 and 43739706.

It is not an unprimeable number, because it can be changed into a prime (43739741) 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 31 ways as a sum of consecutive naturals, for example, 2991 + ... + 9819.

It is an arithmetic number, because the mean of its divisors is an integer number (2540760).

Almost surely, 2^43739745 is an apocalyptic number.

It is an amenable number.

43739745 is a deficient number, since it is larger than the sum of its proper divisors (37564575).

43739745 is a wasteful number, since it uses less digits than its factorization.

43739745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6905.

The product of its digits is 317520, while the sum is 42.

The square root of 43739745 is about 6613.6030270950. The cubic root of 43739745 is about 352.3374030048.

The spelling of 43739745 in words is "forty-three million, seven hundred thirty-nine thousand, seven hundred forty-five".