423520871 has 2 divisors, whose sum is σ = 423520872. Its totient is φ = 423520870.

The previous prime is 423520861. The next prime is 423520891. The reversal of 423520871 is 178025324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423520871 - 2¹⁰ = 423519847 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423520831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211760435 + 211760436.

It is an arithmetic number, because the mean of its divisors is an integer number (211760436).

Almost surely, 2^423520871 is an apocalyptic number.

423520871 is a deficient number, since it is larger than the sum of its proper divisors (1).

423520871 is an equidigital number, since it uses as much as digits as its factorization.

423520871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 423520871 is about 20579.6227127710. The cubic root of 423520871 is about 750.9740653442.

The spelling of 423520871 in words is "four hundred twenty-three million, five hundred twenty thousand, eight hundred seventy-one".