3993893 has 2 divisors, whose sum is σ = 3993894. Its totient is φ = 3993892.

The previous prime is 3993889. The next prime is 3993901. The reversal of 3993893 is 3983993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3104644 + 889249 = 1762^2 + 943^2 .

It is a cyclic number.

It is not a de Polignac number, because 3993893 - 2² = 3993889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3993833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996946 + 1996947.

It is an arithmetic number, because the mean of its divisors is an integer number (1996947).

Almost surely, 2^3993893 is an apocalyptic number.

It is an amenable number.

3993893 is a deficient number, since it is larger than the sum of its proper divisors (1).

3993893 is an equidigital number, since it uses as much as digits as its factorization.

3993893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 44.

The square root of 3993893 is about 1998.4726668133. The cubic root of 3993893 is about 158.6592785636.

The spelling of 3993893 in words is "three million, nine hundred ninety-three thousand, eight hundred ninety-three".