663006923 has 2 divisors, whose sum is σ = 663006924. Its totient is φ = 663006922.

The previous prime is 663006913. The next prime is 663006977. The reversal of 663006923 is 329600366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663006923 - 2²⁸ = 394571467 is a prime.

It is not a weakly prime, because it can be changed into another prime (663006913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331503461 + 331503462.

It is an arithmetic number, because the mean of its divisors is an integer number (331503462).

Almost surely, 2^663006923 is an apocalyptic number.

663006923 is a deficient number, since it is larger than the sum of its proper divisors (1).

663006923 is an equidigital number, since it uses as much as digits as its factorization.

663006923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 663006923 is about 25748.9208123370. The cubic root of 663006923 is about 871.9789903721.

The spelling of 663006923 in words is "six hundred sixty-three million, six thousand, nine hundred twenty-three".