423444319 has 2 divisors, whose sum is σ = 423444320. Its totient is φ = 423444318.

The previous prime is 423444299. The next prime is 423444323. The reversal of 423444319 is 913444324.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423444319 is a prime.

It is a super-2 number, since 2×423444319² = 358610182586747522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423444379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211722159 + 211722160.

It is an arithmetic number, because the mean of its divisors is an integer number (211722160).

Almost surely, 2^423444319 is an apocalyptic number.

423444319 is a deficient number, since it is larger than the sum of its proper divisors (1).

423444319 is an equidigital number, since it uses as much as digits as its factorization.

423444319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 34.

The square root of 423444319 is about 20577.7627306760. The cubic root of 423444319 is about 750.9288160742.

The spelling of 423444319 in words is "four hundred twenty-three million, four hundred forty-four thousand, three hundred nineteen".