423447019 has 2 divisors, whose sum is σ = 423447020. Its totient is φ = 423447018.

The previous prime is 423446983. The next prime is 423447077. The reversal of 423447019 is 910744324.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423447019 - 2²¹ = 421349867 is a prime.

It is a super-2 number, since 2×423447019² = 358614755799972722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423447119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211723509 + 211723510.

It is an arithmetic number, because the mean of its divisors is an integer number (211723510).

Almost surely, 2^423447019 is an apocalyptic number.

423447019 is a deficient number, since it is larger than the sum of its proper divisors (1).

423447019 is an equidigital number, since it uses as much as digits as its factorization.

423447019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 423447019 is about 20577.8283353711. The cubic root of 423447019 is about 750.9304121153.

The spelling of 423447019 in words is "four hundred twenty-three million, four hundred forty-seven thousand, nineteen".