505555693 has 2 divisors, whose sum is σ = 505555694. Its totient is φ = 505555692.

The previous prime is 505555577. The next prime is 505555717. The reversal of 505555693 is 396555505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295943209 + 209612484 = 17203^2 + 14478^2 .

It is a cyclic number.

It is not a de Polignac number, because 505555693 - 2²⁵ = 472001261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505558693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252777846 + 252777847.

It is an arithmetic number, because the mean of its divisors is an integer number (252777847).

Almost surely, 2^505555693 is an apocalyptic number.

It is an amenable number.

505555693 is a deficient number, since it is larger than the sum of its proper divisors (1).

505555693 is an equidigital number, since it uses as much as digits as its factorization.

505555693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 506250, while the sum is 43.

The square root of 505555693 is about 22484.5656618045. The cubic root of 505555693 is about 796.6294089433.

The spelling of 505555693 in words is "five hundred five million, five hundred fifty-five thousand, six hundred ninety-three".