41643993 has 4 divisors (see below), whose sum is σ = 55525328. Its totient is φ = 27762660.

The previous prime is 41643977. The next prime is 41643997. The reversal of 41643993 is 39934614.

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 not a de Polignac number, because 41643993 - 2⁴ = 41643977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41643997) 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, 6940663 + ... + 6940668.

It is an arithmetic number, because the mean of its divisors is an integer number (13881332).

Almost surely, 2^41643993 is an apocalyptic number.

It is an amenable number.

41643993 is a deficient number, since it is larger than the sum of its proper divisors (13881335).

41643993 is a wasteful number, since it uses less digits than its factorization.

41643993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13881334.

The product of its digits is 69984, while the sum is 39.

The square root of 41643993 is about 6453.2157100162. The cubic root of 41643993 is about 346.6177415957.

The spelling of 41643993 in words is "forty-one million, six hundred forty-three thousand, nine hundred ninety-three".