505498717 has 4 divisors (see below), whose sum is σ = 517827996. Its totient is φ = 493169440.

The previous prime is 505498711. The next prime is 505498753. The reversal of 505498717 is 717894505.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 301751641 + 203747076 = 17371^2 + 14274^2 .

It is a cyclic number.

It is not a de Polignac number, because 505498717 - 2¹⁹ = 504974429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505498711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6164578 + ... + 6164659.

It is an arithmetic number, because the mean of its divisors is an integer number (129456999).

Almost surely, 2^505498717 is an apocalyptic number.

It is an amenable number.

505498717 is a deficient number, since it is larger than the sum of its proper divisors (12329279).

505498717 is a wasteful number, since it uses less digits than its factorization.

505498717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12329278.

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 505498717 is about 22483.2986236451. The cubic root of 505498717 is about 796.5994811740.

The spelling of 505498717 in words is "five hundred five million, four hundred ninety-eight thousand, seven hundred seventeen".