423816871 has 2 divisors, whose sum is σ = 423816872. Its totient is φ = 423816870.

The previous prime is 423816857. The next prime is 423816893. The reversal of 423816871 is 178618324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423816871 - 2⁵ = 423816839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423816271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211908435 + 211908436.

It is an arithmetic number, because the mean of its divisors is an integer number (211908436).

Almost surely, 2^423816871 is an apocalyptic number.

423816871 is a deficient number, since it is larger than the sum of its proper divisors (1).

423816871 is an equidigital number, since it uses as much as digits as its factorization.

423816871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 423816871 is about 20586.8130365047. The cubic root of 423816871 is about 751.1489772731.

The spelling of 423816871 in words is "four hundred twenty-three million, eight hundred sixteen thousand, eight hundred seventy-one".