423907843 has 4 divisors (see below), whose sum is σ = 429878448. Its totient is φ = 417937240.

The previous prime is 423907837. The next prime is 423907859. The reversal of 423907843 is 348709324.

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

It is not a de Polignac number, because 423907843 - 2⁵ = 423907811 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423907796 and 423907805.

It is not an unprimeable number, because it can be changed into a prime (423907343) 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, 2985196 + ... + 2985337.

It is an arithmetic number, because the mean of its divisors is an integer number (107469612).

Almost surely, 2^423907843 is an apocalyptic number.

423907843 is a deficient number, since it is larger than the sum of its proper divisors (5970605).

423907843 is an equidigital number, since it uses as much as digits as its factorization.

423907843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5970604.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 423907843 is about 20589.0223905847. The cubic root of 423907843 is about 751.2027179654.

The spelling of 423907843 in words is "four hundred twenty-three million, nine hundred seven thousand, eight hundred forty-three".