505245137 has 2 divisors, whose sum is σ = 505245138. Its totient is φ = 505245136.

The previous prime is 505245133. The next prime is 505245157. The reversal of 505245137 is 731542505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480881041 + 24364096 = 21929^2 + 4936^2 .

It is a cyclic number.

It is not a de Polignac number, because 505245137 - 2² = 505245133 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (505245133) 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 as a sum of consecutive naturals, namely, 252622568 + 252622569.

It is an arithmetic number, because the mean of its divisors is an integer number (252622569).

Almost surely, 2^505245137 is an apocalyptic number.

It is an amenable number.

505245137 is a deficient number, since it is larger than the sum of its proper divisors (1).

505245137 is an equidigital number, since it uses as much as digits as its factorization.

505245137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 505245137 is about 22477.6586191712. The cubic root of 505245137 is about 796.4662559869.

The spelling of 505245137 in words is "five hundred five million, two hundred forty-five thousand, one hundred thirty-seven".