505540097 has 4 divisors (see below), whose sum is σ = 505587780. Its totient is φ = 505492416.

The previous prime is 505540043. The next prime is 505540117. The reversal of 505540097 is 790045505.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 275593201 + 229946896 = 16601^2 + 15164^2 .

It is a cyclic number.

It is not a de Polignac number, because 505540097 - 2¹⁸ = 505277953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505549097) 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, 29 + ... + 31797.

It is an arithmetic number, because the mean of its divisors is an integer number (126396945).

Almost surely, 2^505540097 is an apocalyptic number.

It is an amenable number.

505540097 is a deficient number, since it is larger than the sum of its proper divisors (47683).

505540097 is a wasteful number, since it uses less digits than its factorization.

505540097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47682.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 505540097 is about 22484.2188434466. The cubic root of 505540097 is about 796.6212170598.

The spelling of 505540097 in words is "five hundred five million, five hundred forty thousand, ninety-seven".