4537993 has 2 divisors, whose sum is σ = 4537994. Its totient is φ = 4537992.

The previous prime is 4537987. The next prime is 4538033. The reversal of 4537993 is 3997354.

It is an a-pointer prime, because the next prime (4538033) can be obtained adding 4537993 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3948169 + 589824 = 1987^2 + 768^2 .

It is a cyclic number.

It is not a de Polignac number, because 4537993 - 2⁵ = 4537961 is a prime.

It is not a weakly prime, because it can be changed into another prime (4537493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2268996 + 2268997.

It is an arithmetic number, because the mean of its divisors is an integer number (2268997).

Almost surely, 2^4537993 is an apocalyptic number.

It is an amenable number.

4537993 is a deficient number, since it is larger than the sum of its proper divisors (1).

4537993 is an equidigital number, since it uses as much as digits as its factorization.

4537993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 40.

The square root of 4537993 is about 2130.2565573189. The cubic root of 4537993 is about 165.5596910184.

The spelling of 4537993 in words is "four million, five hundred thirty-seven thousand, nine hundred ninety-three".