43433993 has 4 divisors (see below), whose sum is σ = 43832580. Its totient is φ = 43035408.

The previous prime is 43433989. The next prime is 43434011. The reversal of 43433993 is 39933434.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17749369 + 25684624 = 4213^2 + 5068^2 .

It is a cyclic number.

It is not a de Polignac number, because 43433993 - 2² = 43433989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43433293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199130 + ... + 199347.

It is an arithmetic number, because the mean of its divisors is an integer number (10958145).

Almost surely, 2^43433993 is an apocalyptic number.

It is an amenable number.

43433993 is a deficient number, since it is larger than the sum of its proper divisors (398587).

43433993 is a wasteful number, since it uses less digits than its factorization.

43433993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398586.

The product of its digits is 104976, while the sum is 38.

The square root of 43433993 is about 6590.4471016768. The cubic root of 43433993 is about 351.5145064216.

The spelling of 43433993 in words is "forty-three million, four hundred thirty-three thousand, nine hundred ninety-three".