423243019 has 2 divisors, whose sum is σ = 423243020. Its totient is φ = 423243018.

The previous prime is 423243013. The next prime is 423243047. The reversal of 423243019 is 910342324.

It is an a-pointer prime, because the next prime (423243047) can be obtained adding 423243019 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423243019 - 2¹⁹ = 422718731 is a prime.

It is a super-2 number, since 2×423243019² = 358269306264468722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (423243013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211621509 + 211621510.

It is an arithmetic number, because the mean of its divisors is an integer number (211621510).

Almost surely, 2^423243019 is an apocalyptic number.

423243019 is a deficient number, since it is larger than the sum of its proper divisors (1).

423243019 is an equidigital number, since it uses as much as digits as its factorization.

423243019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 423243019 is about 20572.8709469534. The cubic root of 423243019 is about 750.8098032362.

The spelling of 423243019 in words is "four hundred twenty-three million, two hundred forty-three thousand, nineteen".