423029993 has 2 divisors, whose sum is σ = 423029994. Its totient is φ = 423029992.

The previous prime is 423029983. The next prime is 423030017. The reversal of 423029993 is 399920324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297321049 + 125708944 = 17243^2 + 11212^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423029993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423029993.

It is not a weakly prime, because it can be changed into another prime (423029903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211514996 + 211514997.

It is an arithmetic number, because the mean of its divisors is an integer number (211514997).

Almost surely, 2^423029993 is an apocalyptic number.

It is an amenable number.

423029993 is a deficient number, since it is larger than the sum of its proper divisors (1).

423029993 is an equidigital number, since it uses as much as digits as its factorization.

423029993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 423029993 is about 20567.6929430600. The cubic root of 423029993 is about 750.6838166332.

The spelling of 423029993 in words is "four hundred twenty-three million, twenty-nine thousand, nine hundred ninety-three".