423991909305 has 24 divisors (see below), whose sum is σ = 739167411528. Its totient is φ = 224821910016.

The previous prime is 423991909261. The next prime is 423991909373. The reversal of 423991909305 is 503909199324.

It can be written as a sum of positive squares in 4 ways, for example, as 34585956729 + 389405952576 = 185973^2 + 624024^2 .

It is not a de Polignac number, because 423991909305 - 2⁷ = 423991909177 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27223552 + ... + 27239121.

It is an arithmetic number, because the mean of its divisors is an integer number (30798642147).

Almost surely, 2^423991909305 is an apocalyptic number.

423991909305 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

423991909305 is a deficient number, since it is larger than the sum of its proper divisors (315175502223).

423991909305 is a wasteful number, since it uses less digits than its factorization.

423991909305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54462857 (or 54462854 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 54.

The spelling of 423991909305 in words is "four hundred twenty-three billion, nine hundred ninety-one million, nine hundred nine thousand, three hundred five".