505255879 has 2 divisors, whose sum is σ = 505255880. Its totient is φ = 505255878.

The previous prime is 505255867. The next prime is 505255909. The reversal of 505255879 is 978552505.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505255879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505255859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252627939 + 252627940.

It is an arithmetic number, because the mean of its divisors is an integer number (252627940).

Almost surely, 2^505255879 is an apocalyptic number.

505255879 is a deficient number, since it is larger than the sum of its proper divisors (1).

505255879 is an equidigital number, since it uses as much as digits as its factorization.

505255879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630000, while the sum is 46.

The square root of 505255879 is about 22477.8975662761. The cubic root of 505255879 is about 796.4719004944.

The spelling of 505255879 in words is "five hundred five million, two hundred fifty-five thousand, eight hundred seventy-nine".