423926891 has 12 divisors (see below), whose sum is σ = 439414416. Its totient is φ = 408969360.

The previous prime is 423926863. The next prime is 423926911. The reversal of 423926891 is 198629324.

It is not a de Polignac number, because 423926891 - 2¹⁰ = 423925867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423926821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 482945 + ... + 483821.

It is an arithmetic number, because the mean of its divisors is an integer number (36617868).

Almost surely, 2^423926891 is an apocalyptic number.

423926891 is a deficient number, since it is larger than the sum of its proper divisors (15487525).

423926891 is an equidigital number, since it uses as much as digits as its factorization.

423926891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442 (or 1411 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 423926891 is about 20589.4849619897. The cubic root of 423926891 is about 751.2139693850.

The spelling of 423926891 in words is "four hundred twenty-three million, nine hundred twenty-six thousand, eight hundred ninety-one".