423173999 has 2 divisors, whose sum is σ = 423174000. Its totient is φ = 423173998.

The previous prime is 423173983. The next prime is 423174001. The reversal of 423173999 is 999371324.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423173999 - 2⁴ = 423173983 is a prime.

Together with 423174001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423173599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211586999 + 211587000.

It is an arithmetic number, because the mean of its divisors is an integer number (211587000).

Almost surely, 2^423173999 is an apocalyptic number.

423173999 is a deficient number, since it is larger than the sum of its proper divisors (1).

423173999 is an equidigital number, since it uses as much as digits as its factorization.

423173999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 47.

The square root of 423173999 is about 20571.1934267315. The cubic root of 423173999 is about 750.7689884580.

The spelling of 423173999 in words is "four hundred twenty-three million, one hundred seventy-three thousand, nine hundred ninety-nine".