505045423 has 2 divisors, whose sum is σ = 505045424. Its totient is φ = 505045422.

The previous prime is 505045399. The next prime is 505045433. The reversal of 505045423 is 324540505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505045423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 505045391 and 505045400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505045433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252522711 + 252522712.

It is an arithmetic number, because the mean of its divisors is an integer number (252522712).

Almost surely, 2^505045423 is an apocalyptic number.

505045423 is a deficient number, since it is larger than the sum of its proper divisors (1).

505045423 is an equidigital number, since it uses as much as digits as its factorization.

505045423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 505045423 is about 22473.2156800045. The cubic root of 505045423 is about 796.3612993937.

Adding to 505045423 its reverse (324540505), we get a palindrome (829585928).

The spelling of 505045423 in words is "five hundred five million, forty-five thousand, four hundred twenty-three".