4221993 has 8 divisors (see below), whose sum is σ = 5721856. Its totient is φ = 2768400.

The previous prime is 4221989. The next prime is 4222003. The reversal of 4221993 is 3991224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4221993 - 2² = 4221989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4221993.

It is not an unprimeable number, because it can be changed into a prime (4221913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11353 + ... + 11718.

It is an arithmetic number, because the mean of its divisors is an integer number (715232).

Almost surely, 2^4221993 is an apocalyptic number.

It is an amenable number.

4221993 is a deficient number, since it is larger than the sum of its proper divisors (1499863).

4221993 is a wasteful number, since it uses less digits than its factorization.

4221993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23135.

The product of its digits is 3888, while the sum is 30.

The square root of 4221993 is about 2054.7488897673. The cubic root of 4221993 is about 161.6239945949.

It can be divided in two parts, 422 and 1993, that added together give a triangular number (2415 = T₆₉).

The spelling of 4221993 in words is "four million, two hundred twenty-one thousand, nine hundred ninety-three".