505555499 has 4 divisors (see below), whose sum is σ = 515094336. Its totient is φ = 496016664.

The previous prime is 505555481. The next prime is 505555507. The reversal of 505555499 is 994555505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505555499 - 2⁸ = 505555243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505555459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4769339 + ... + 4769444.

It is an arithmetic number, because the mean of its divisors is an integer number (128773584).

Almost surely, 2^505555499 is an apocalyptic number.

505555499 is a deficient number, since it is larger than the sum of its proper divisors (9538837).

505555499 is an equidigital number, since it uses as much as digits as its factorization.

505555499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9538836.

The product of its (nonzero) digits is 1012500, while the sum is 47.

The square root of 505555499 is about 22484.5613477337. The cubic root of 505555499 is about 796.6293070448.

The spelling of 505555499 in words is "five hundred five million, five hundred fifty-five thousand, four hundred ninety-nine".