423899999 has 2 divisors, whose sum is σ = 423900000. Its totient is φ = 423899998.

The previous prime is 423899923. The next prime is 423900011. The reversal of 423899999 is 999998324.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423899999 is a prime.

423899999 is a modest number, since divided by 99999 gives 4238 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423892999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211949999 + 211950000.

It is an arithmetic number, because the mean of its divisors is an integer number (211950000).

Almost surely, 2^423899999 is an apocalyptic number.

423899999 is a deficient number, since it is larger than the sum of its proper divisors (1).

423899999 is an equidigital number, since it uses as much as digits as its factorization.

423899999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11337408, while the sum is 62.

The square root of 423899999 is about 20588.8318998432. The cubic root of 423899999 is about 751.1980845130.

The spelling of 423899999 in words is "four hundred twenty-three million, eight hundred ninety-nine thousand, nine hundred ninety-nine".