505917499 has 16 divisors (see below), whose sum is σ = 547372800. Its totient is φ = 466161696.

The previous prime is 505917493. The next prime is 505917523. The reversal of 505917499 is 994719505.

It is a cyclic number.

It is not a de Polignac number, because 505917499 - 2¹⁹ = 505393211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505917493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572512 + ... + 573394.

It is an arithmetic number, because the mean of its divisors is an integer number (34210800).

Almost surely, 2^505917499 is an apocalyptic number.

505917499 is a deficient number, since it is larger than the sum of its proper divisors (41455301).

505917499 is a wasteful number, since it uses less digits than its factorization.

505917499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794.

The product of its (nonzero) digits is 510300, while the sum is 49.

The square root of 505917499 is about 22492.6098752457. The cubic root of 505917499 is about 796.8194022346.

The spelling of 505917499 in words is "five hundred five million, nine hundred seventeen thousand, four hundred ninety-nine".