43942993 has 4 divisors (see below), whose sum is σ = 44369728. Its totient is φ = 43516260.

The previous prime is 43942961. The next prime is 43943047. The reversal of 43942993 is 39924934.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43942993 - 2⁵ = 43942961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43943993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213213 + ... + 213418.

It is an arithmetic number, because the mean of its divisors is an integer number (11092432).

Almost surely, 2^43942993 is an apocalyptic number.

It is an amenable number.

43942993 is a deficient number, since it is larger than the sum of its proper divisors (426735).

43942993 is a wasteful number, since it uses less digits than its factorization.

43942993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426734.

The product of its digits is 209952, while the sum is 43.

The square root of 43942993 is about 6628.9511236696. The cubic root of 43942993 is about 352.8823020582.

The spelling of 43942993 in words is "forty-three million, nine hundred forty-two thousand, nine hundred ninety-three".