43243749 has 12 divisors (see below), whose sum is σ = 65179296. Its totient is φ = 27575592.

The previous prime is 43243723. The next prime is 43243769. The reversal of 43243749 is 94734234.

It is not a de Polignac number, because 43243749 - 2⁷ = 43243621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43243709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104247 + ... + 104660.

It is an arithmetic number, because the mean of its divisors is an integer number (5431608).

Almost surely, 2^43243749 is an apocalyptic number.

It is an amenable number.

43243749 is a deficient number, since it is larger than the sum of its proper divisors (21935547).

43243749 is a wasteful number, since it uses less digits than its factorization.

43243749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208936 (or 208933 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 43243749 is about 6575.9979470800. The cubic root of 43243749 is about 351.0005357091. Note that the first 3 decimals are identical.

The spelling of 43243749 in words is "forty-three million, two hundred forty-three thousand, seven hundred forty-nine".