505566623 has 2 divisors, whose sum is σ = 505566624. Its totient is φ = 505566622.

The previous prime is 505566577. The next prime is 505566637. The reversal of 505566623 is 326665505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505566623 - 2⁶ = 505566559 is a prime.

It is a super-2 number, since 2×505566623² = 511195220583248258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505566643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252783311 + 252783312.

It is an arithmetic number, because the mean of its divisors is an integer number (252783312).

Almost surely, 2^505566623 is an apocalyptic number.

505566623 is a deficient number, since it is larger than the sum of its proper divisors (1).

505566623 is an equidigital number, since it uses as much as digits as its factorization.

505566623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 38.

The square root of 505566623 is about 22484.8087161087. The cubic root of 505566623 is about 796.6351498846.

The spelling of 505566623 in words is "five hundred five million, five hundred sixty-six thousand, six hundred twenty-three".