423660019 has 2 divisors, whose sum is σ = 423660020. Its totient is φ = 423660018.

The previous prime is 423659987. The next prime is 423660031. The reversal of 423660019 is 910066324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423660019 - 2⁵ = 423659987 is a prime.

It is a super-2 number, since 2×423660019² = 358975623398160722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423660049) 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, 211830009 + 211830010.

It is an arithmetic number, because the mean of its divisors is an integer number (211830010).

Almost surely, 2^423660019 is an apocalyptic number.

423660019 is a deficient number, since it is larger than the sum of its proper divisors (1).

423660019 is an equidigital number, since it uses as much as digits as its factorization.

423660019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 423660019 is about 20583.0031579456. The cubic root of 423660019 is about 751.0563006439.

The spelling of 423660019 in words is "four hundred twenty-three million, six hundred sixty thousand, nineteen".