3218993 has 2 divisors, whose sum is σ = 3218994. Its totient is φ = 3218992.

The previous prime is 3218987. The next prime is 3219019. The reversal of 3218993 is 3998123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2745649 + 473344 = 1657^2 + 688^2 .

It is a cyclic number.

It is not a de Polignac number, because 3218993 - 2⁸ = 3218737 is a prime.

It is not a weakly prime, because it can be changed into another prime (3218953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609496 + 1609497.

It is an arithmetic number, because the mean of its divisors is an integer number (1609497).

Almost surely, 2^3218993 is an apocalyptic number.

It is an amenable number.

3218993 is a deficient number, since it is larger than the sum of its proper divisors (1).

3218993 is an equidigital number, since it uses as much as digits as its factorization.

3218993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 3218993 is about 1794.1552329718. The cubic root of 3218993 is about 147.6522300792.

The spelling of 3218993 in words is "three million, two hundred eighteen thousand, nine hundred ninety-three".