668002943 has 2 divisors, whose sum is σ = 668002944. Its totient is φ = 668002942.

The previous prime is 668002891. The next prime is 668002949. The reversal of 668002943 is 349200866.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668002943 is a prime.

It is a super-2 number, since 2×668002943² = 892455863713322498, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 668002897 and 668002906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668002949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334001471 + 334001472.

It is an arithmetic number, because the mean of its divisors is an integer number (334001472).

Almost surely, 2^668002943 is an apocalyptic number.

668002943 is a deficient number, since it is larger than the sum of its proper divisors (1).

668002943 is an equidigital number, since it uses as much as digits as its factorization.

668002943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 668002943 is about 25845.7529006218. The cubic root of 668002943 is about 874.1637476463.

The spelling of 668002943 in words is "six hundred sixty-eight million, two thousand, nine hundred forty-three".