4561993 has 2 divisors, whose sum is σ = 4561994. Its totient is φ = 4561992.

The previous prime is 4561979. The next prime is 4562003. The reversal of 4561993 is 3991654.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3810304 + 751689 = 1952^2 + 867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4561993 is a prime.

It is not a weakly prime, because it can be changed into another prime (4561943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2280996 + 2280997.

It is an arithmetic number, because the mean of its divisors is an integer number (2280997).

Almost surely, 2^4561993 is an apocalyptic number.

It is an amenable number.

4561993 is a deficient number, since it is larger than the sum of its proper divisors (1).

4561993 is an equidigital number, since it uses as much as digits as its factorization.

4561993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 4561993 is about 2135.8822533089. The cubic root of 4561993 is about 165.8510421622.

The spelling of 4561993 in words is "four million, five hundred sixty-one thousand, nine hundred ninety-three".