664293943 has 2 divisors, whose sum is σ = 664293944. Its totient is φ = 664293942.

The previous prime is 664293937. The next prime is 664293983. The reversal of 664293943 is 349392466.

664293943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664293943 - 2⁹ = 664293431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664293893 and 664293902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664293983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332146971 + 332146972.

It is an arithmetic number, because the mean of its divisors is an integer number (332146972).

Almost surely, 2^664293943 is an apocalyptic number.

664293943 is a deficient number, since it is larger than the sum of its proper divisors (1).

664293943 is an equidigital number, since it uses as much as digits as its factorization.

664293943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 46.

The square root of 664293943 is about 25773.9004227144. The cubic root of 664293943 is about 872.5428502530.

The spelling of 664293943 in words is "six hundred sixty-four million, two hundred ninety-three thousand, nine hundred forty-three".