423001309 has 2 divisors, whose sum is σ = 423001310. Its totient is φ = 423001308.

The previous prime is 423001291. The next prime is 423001331. The reversal of 423001309 is 903100324.

It is an a-pointer prime, because the next prime (423001331) can be obtained adding 423001309 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390260025 + 32741284 = 19755^2 + 5722^2 .

It is a cyclic number.

It is not a de Polignac number, because 423001309 - 2⁷ = 423001181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423001309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423001339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211500654 + 211500655.

It is an arithmetic number, because the mean of its divisors is an integer number (211500655).

Almost surely, 2^423001309 is an apocalyptic number.

It is an amenable number.

423001309 is a deficient number, since it is larger than the sum of its proper divisors (1).

423001309 is an equidigital number, since it uses as much as digits as its factorization.

423001309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 423001309 is about 20566.9956240575. The cubic root of 423001309 is about 750.6668492774. Note that the first 3 decimals are identical.

The spelling of 423001309 in words is "four hundred twenty-three million, one thousand, three hundred nine".