43940693 has 4 divisors (see below), whose sum is σ = 44559648. Its totient is φ = 43321740.

The previous prime is 43940681. The next prime is 43940717. The reversal of 43940693 is 39604934.

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 43940693 - 2¹² = 43936597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43940623) 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, 309371 + ... + 309512.

It is an arithmetic number, because the mean of its divisors is an integer number (11139912).

Almost surely, 2^43940693 is an apocalyptic number.

It is an amenable number.

43940693 is a deficient number, since it is larger than the sum of its proper divisors (618955).

43940693 is an equidigital number, since it uses as much as digits as its factorization.

43940693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618954.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 43940693 is about 6628.7776399575. Note that the first 3 decimals coincide. The cubic root of 43940693 is about 352.8761452673.

The spelling of 43940693 in words is "forty-three million, nine hundred forty thousand, six hundred ninety-three".