423321232993 has 2 divisors, whose sum is σ = 423321232994. Its totient is φ = 423321232992.

The previous prime is 423321232987. The next prime is 423321233039. The reversal of 423321232993 is 399232123324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380186927649 + 43134305344 = 616593^2 + 207688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423321232993 is a prime.

It is not a weakly prime, because it can be changed into another prime (423321232963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211660616496 + 211660616497.

It is an arithmetic number, because the mean of its divisors is an integer number (211660616497).

Almost surely, 2^423321232993 is an apocalyptic number.

It is an amenable number.

423321232993 is a deficient number, since it is larger than the sum of its proper divisors (1).

423321232993 is an equidigital number, since it uses as much as digits as its factorization.

423321232993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 43.

The spelling of 423321232993 in words is "four hundred twenty-three billion, three hundred twenty-one million, two hundred thirty-two thousand, nine hundred ninety-three".