505139 has 2 divisors, whose sum is σ = 505140. Its totient is φ = 505138.

The previous prime is 505129. The next prime is 505157. The reversal of 505139 is 931505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505139 - 2⁴ = 505123 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505139.

It is not a weakly prime, because it can be changed into another prime (505129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252569 + 252570.

It is an arithmetic number, because the mean of its divisors is an integer number (252570).

2⁵⁰⁵¹³⁹ is an apocalyptic number.

505139 is a deficient number, since it is larger than the sum of its proper divisors (1).

505139 is an equidigital number, since it uses as much as digits as its factorization.

505139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 505139 is about 710.7313135074. The cubic root of 505139 is about 79.6410480778.

The spelling of 505139 in words is "five hundred five thousand, one hundred thirty-nine".