423115243 has 2 divisors, whose sum is σ = 423115244. Its totient is φ = 423115242.

The previous prime is 423115241. The next prime is 423115247. The reversal of 423115243 is 342511324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423115243 - 2¹ = 423115241 is a prime.

Together with 423115241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (423115241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211557621 + 211557622.

It is an arithmetic number, because the mean of its divisors is an integer number (211557622).

Almost surely, 2^423115243 is an apocalyptic number.

423115243 is a deficient number, since it is larger than the sum of its proper divisors (1).

423115243 is an equidigital number, since it uses as much as digits as its factorization.

423115243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 423115243 is about 20569.7652636096. The cubic root of 423115243 is about 750.7342397695.

Adding to 423115243 its reverse (342511324), we get a palindrome (765626567).

The spelling of 423115243 in words is "four hundred twenty-three million, one hundred fifteen thousand, two hundred forty-three".