423971811 has 18 divisors (see below), whose sum is σ = 640194828. Its totient is φ = 270355800.

The previous prime is 423971797. The next prime is 423971843. The reversal of 423971811 is 118179324.

It is a happy number.

It is not a de Polignac number, because 423971811 - 2⁶ = 423971747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423971861) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 39765 + ... + 49286.

Almost surely, 2^423971811 is an apocalyptic number.

423971811 is a deficient number, since it is larger than the sum of its proper divisors (216223017).

423971811 is a wasteful number, since it uses less digits than its factorization.

423971811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89103 (or 89077 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 423971811 is about 20590.5757811675. The cubic root of 423971811 is about 751.2405017427.

The spelling of 423971811 in words is "four hundred twenty-three million, nine hundred seventy-one thousand, eight hundred eleven".