4681993 has 2 divisors, whose sum is σ = 4681994. Its totient is φ = 4681992.

The previous prime is 4681991. The next prime is 4681997. The reversal of 4681993 is 3991864.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3697929 + 984064 = 1923^2 + 992^2 .

It is a cyclic number.

It is not a de Polignac number, because 4681993 - 2¹ = 4681991 is a prime.

Together with 4681991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4681991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2340996 + 2340997.

It is an arithmetic number, because the mean of its divisors is an integer number (2340997).

Almost surely, 2^4681993 is an apocalyptic number.

It is an amenable number.

4681993 is a deficient number, since it is larger than the sum of its proper divisors (1).

4681993 is an equidigital number, since it uses as much as digits as its factorization.

4681993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 4681993 is about 2163.7913485362. The cubic root of 4681993 is about 167.2926728647.

The spelling of 4681993 in words is "four million, six hundred eighty-one thousand, nine hundred ninety-three".