623643001 has 2 divisors, whose sum is σ = 623643002. Its totient is φ = 623643000.

The previous prime is 623642989. The next prime is 623643017. The reversal of 623643001 is 100346326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 555827776 + 67815225 = 23576^2 + 8235^2 .

It is a cyclic number.

It is not a de Polignac number, because 623643001 - 2⁹ = 623642489 is a prime.

It is not a weakly prime, because it can be changed into another prime (623643071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311821500 + 311821501.

It is an arithmetic number, because the mean of its divisors is an integer number (311821501).

Almost surely, 2^623643001 is an apocalyptic number.

It is an amenable number.

623643001 is a deficient number, since it is larger than the sum of its proper divisors (1).

623643001 is an equidigital number, since it uses as much as digits as its factorization.

623643001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 623643001 is about 24972.8452724154. The cubic root of 623643001 is about 854.3687421240.

Adding to 623643001 its reverse (100346326), we get a palindrome (723989327).

The spelling of 623643001 in words is "six hundred twenty-three million, six hundred forty-three thousand, one".