3994993 has 2 divisors, whose sum is σ = 3994994. Its totient is φ = 3994992.

The previous prime is 3994961. The next prime is 3995021.

3994993 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3952144 + 42849 = 1988^2 + 207^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 3994993 - 2⁵ = 3994961 is a prime.

It is not a weakly prime, because it can be changed into another prime (3994933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1997496 + 1997497.

It is an arithmetic number, because the mean of its divisors is an integer number (1997497).

Almost surely, 2^3994993 is an apocalyptic number.

It is an amenable number.

3994993 is a deficient number, since it is larger than the sum of its proper divisors (1).

3994993 is an equidigital number, since it uses as much as digits as its factorization.

3994993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 236196, while the sum is 46.

The square root of 3994993 is about 1998.7478580351. The cubic root of 3994993 is about 158.6738432324.

The spelling of 3994993 in words is "three million, nine hundred ninety-four thousand, nine hundred ninety-three".