423627905 has 4 divisors (see below), whose sum is σ = 508353492. Its totient is φ = 338902320.

The previous prime is 423627839. The next prime is 423627907. The reversal of 423627905 is 509726324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 184987201 + 238640704 = 13601^2 + 15448^2 .

It is not a de Polignac number, because 423627905 - 2⁸ = 423627649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (423627907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42362786 + ... + 42362795.

It is an arithmetic number, because the mean of its divisors is an integer number (127088373).

Almost surely, 2^423627905 is an apocalyptic number.

It is an amenable number.

423627905 is a deficient number, since it is larger than the sum of its proper divisors (84725587).

423627905 is an equidigital number, since it uses as much as digits as its factorization.

423627905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84725586.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 423627905 is about 20582.2230334821. The cubic root of 423627905 is about 751.0373231380.

The spelling of 423627905 in words is "four hundred twenty-three million, six hundred twenty-seven thousand, nine hundred five".