2663993 has 2 divisors, whose sum is σ = 2663994. Its totient is φ = 2663992.

The previous prime is 2663977. The next prime is 2664001. The reversal of 2663993 is 3993662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2347024 + 316969 = 1532^2 + 563^2 .

It is a cyclic number.

It is not a de Polignac number, because 2663993 - 2⁴ = 2663977 is a prime.

It is not a weakly prime, because it can be changed into another prime (2663953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1331996 + 1331997.

It is an arithmetic number, because the mean of its divisors is an integer number (1331997).

2^2663993 is an apocalyptic number.

It is an amenable number.

2663993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2663993 is an equidigital number, since it uses as much as digits as its factorization.

2663993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 38.

The square root of 2663993 is about 1632.1743166709. The cubic root of 2663993 is about 138.6258939493.

The spelling of 2663993 in words is "two million, six hundred sixty-three thousand, nine hundred ninety-three".