505340039 has 2 divisors, whose sum is σ = 505340040. Its totient is φ = 505340038.

The previous prime is 505340009. The next prime is 505340041. The reversal of 505340039 is 930043505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505340039 - 2¹⁶ = 505274503 is a prime.

It is a Sophie Germain prime.

Together with 505340041, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_26621822 and since 505340039 and 26621822 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 505339993 and 505340020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505340009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252670019 + 252670020.

It is an arithmetic number, because the mean of its divisors is an integer number (252670020).

Almost surely, 2^505340039 is an apocalyptic number.

505340039 is a deficient number, since it is larger than the sum of its proper divisors (1).

505340039 is an equidigital number, since it uses as much as digits as its factorization.

505340039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 505340039 is about 22479.7695495305. The cubic root of 505340039 is about 796.5161205662.

The spelling of 505340039 in words is "five hundred five million, three hundred forty thousand, thirty-nine".