505411657 has 8 divisors (see below), whose sum is σ = 523392840. Its totient is φ = 487743360.

The previous prime is 505411607. The next prime is 505411661. The reversal of 505411657 is 756114505.

It can be written as a sum of positive squares in 4 ways, for example, as 20575296 + 484836361 = 4536^2 + 22019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505411657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505411607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74932 + ... + 81397.

It is an arithmetic number, because the mean of its divisors is an integer number (65424105).

Almost surely, 2^505411657 is an apocalyptic number.

It is an amenable number.

505411657 is a deficient number, since it is larger than the sum of its proper divisors (17981183).

505411657 is a wasteful number, since it uses less digits than its factorization.

505411657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156443.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 505411657 is about 22481.3624364717. The cubic root of 505411657 is about 796.5537468459.

The spelling of 505411657 in words is "five hundred five million, four hundred eleven thousand, six hundred fifty-seven".