423729919 has 2 divisors, whose sum is σ = 423729920. Its totient is φ = 423729918.

The previous prime is 423729907. The next prime is 423729937. The reversal of 423729919 is 919927324.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423729919 - 2⁷ = 423729791 is a prime.

It is a super-2 number, since 2×423729919² = 359094088511493122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423723919) 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, 211864959 + 211864960.

It is an arithmetic number, because the mean of its divisors is an integer number (211864960).

Almost surely, 2^423729919 is an apocalyptic number.

423729919 is a deficient number, since it is larger than the sum of its proper divisors (1).

423729919 is an equidigital number, since it uses as much as digits as its factorization.

423729919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 423729919 is about 20584.7010908587. The cubic root of 423729919 is about 751.0976041625.

The spelling of 423729919 in words is "four hundred twenty-three million, seven hundred twenty-nine thousand, nine hundred nineteen".