4521993 has 16 divisors (see below), whose sum is σ = 6921600. Its totient is φ = 2572416.

The previous prime is 4521977. The next prime is 4522027. The reversal of 4521993 is 3991254.

It is not a de Polignac number, because 4521993 - 2⁴ = 4521977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4521973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7021 + ... + 7637.

It is an arithmetic number, because the mean of its divisors is an integer number (432600).

Almost surely, 2^4521993 is an apocalyptic number.

It is an amenable number.

4521993 is a deficient number, since it is larger than the sum of its proper divisors (2399607).

4521993 is a wasteful number, since it uses less digits than its factorization.

4521993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976.

The product of its digits is 9720, while the sum is 33.

The square root of 4521993 is about 2126.4978250635. The cubic root of 4521993 is about 165.3648857828.

The spelling of 4521993 in words is "four million, five hundred twenty-one thousand, nine hundred ninety-three".