423236993 has 2 divisors, whose sum is σ = 423236994. Its totient is φ = 423236992.

The previous prime is 423236929. The next prime is 423237019. The reversal of 423236993 is 399632324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338817649 + 84419344 = 18407^2 + 9188^2 .

It is a cyclic number.

It is not a de Polignac number, because 423236993 - 2⁶ = 423236929 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423236993.

It is not a weakly prime, because it can be changed into another prime (423236903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211618496 + 211618497.

It is an arithmetic number, because the mean of its divisors is an integer number (211618497).

Almost surely, 2^423236993 is an apocalyptic number.

It is an amenable number.

423236993 is a deficient number, since it is larger than the sum of its proper divisors (1).

423236993 is an equidigital number, since it uses as much as digits as its factorization.

423236993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 41.

The square root of 423236993 is about 20572.7244914231. The cubic root of 423236993 is about 750.8062399552.

The spelling of 423236993 in words is "four hundred twenty-three million, two hundred thirty-six thousand, nine hundred ninety-three".