420545023 has 2 divisors, whose sum is σ = 420545024. Its totient is φ = 420545022.

The previous prime is 420545017. The next prime is 420545033. The reversal of 420545023 is 320545024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420545023 - 2⁵ = 420544991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420545003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210272511 + 210272512.

It is an arithmetic number, because the mean of its divisors is an integer number (210272512).

Almost surely, 2^420545023 is an apocalyptic number.

420545023 is a deficient number, since it is larger than the sum of its proper divisors (1).

420545023 is an equidigital number, since it uses as much as digits as its factorization.

420545023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 420545023 is about 20507.1944204955. The cubic root of 420545023 is about 749.2110358199.

Subtracting from 420545023 its reverse (320545024), we obtain a palindrome (99999999).

The spelling of 420545023 in words is "four hundred twenty million, five hundred forty-five thousand, twenty-three".