505287973 has 2 divisors, whose sum is σ = 505287974. Its totient is φ = 505287972.

The previous prime is 505287953. The next prime is 505287983. The reversal of 505287973 is 379782505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372991969 + 132296004 = 19313^2 + 11502^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505287973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505287953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252643986 + 252643987.

It is an arithmetic number, because the mean of its divisors is an integer number (252643987).

Almost surely, 2^505287973 is an apocalyptic number.

It is an amenable number.

505287973 is a deficient number, since it is larger than the sum of its proper divisors (1).

505287973 is an equidigital number, since it uses as much as digits as its factorization.

505287973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 46.

The square root of 505287973 is about 22478.6114562266. The cubic root of 505287973 is about 796.4887641794.

It can be divided in two parts, 5052 and 87973, that added together give a square (93025 = 305²).

The spelling of 505287973 in words is "five hundred five million, two hundred eighty-seven thousand, nine hundred seventy-three".