4189993 has 4 divisors (see below), whose sum is σ = 4211460. Its totient is φ = 4168528.

The previous prime is 4189987. The next prime is 4190009. The reversal of 4189993 is 3999814.

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 3489424 + 700569 = 1868^2 + 837^2 .

It is a cyclic number.

It is not a de Polignac number, because 4189993 - 2⁵ = 4189961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4189903) 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, 10438 + ... + 10831.

It is an arithmetic number, because the mean of its divisors is an integer number (1052865).

Almost surely, 2^4189993 is an apocalyptic number.

It is an amenable number.

4189993 is a deficient number, since it is larger than the sum of its proper divisors (21467).

4189993 is a wasteful number, since it uses less digits than its factorization.

4189993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21466.

The product of its digits is 69984, while the sum is 43.

The square root of 4189993 is about 2046.9472391833. The cubic root of 4189993 is about 161.2146231708.

The spelling of 4189993 in words is "four million, one hundred eighty-nine thousand, nine hundred ninety-three".