423940571 has 2 divisors, whose sum is σ = 423940572. Its totient is φ = 423940570.

The previous prime is 423940523. The next prime is 423940579. The reversal of 423940571 is 175049324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423940571 - 2⁶ = 423940507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (423940579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211970285 + 211970286.

It is an arithmetic number, because the mean of its divisors is an integer number (211970286).

Almost surely, 2^423940571 is an apocalyptic number.

423940571 is a deficient number, since it is larger than the sum of its proper divisors (1).

423940571 is an equidigital number, since it uses as much as digits as its factorization.

423940571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 423940571 is about 20589.8171677167. The cubic root of 423940571 is about 751.2220497850. Note that the first 3 decimals are identical.

Adding to 423940571 its reverse (175049324), we get a palindrome (598989895).

The spelling of 423940571 in words is "four hundred twenty-three million, nine hundred forty thousand, five hundred seventy-one".