505619 has 2 divisors, whose sum is σ = 505620. Its totient is φ = 505618.

The previous prime is 505613. The next prime is 505633. The reversal of 505619 is 916505.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505619 is a prime.

It is a super-2 number, since 2×505619² = 511301146322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (505613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252809 + 252810.

It is an arithmetic number, because the mean of its divisors is an integer number (252810).

2⁵⁰⁵⁶¹⁹ is an apocalyptic number.

505619 is a deficient number, since it is larger than the sum of its proper divisors (1).

505619 is an equidigital number, since it uses as much as digits as its factorization.

505619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 505619 is about 711.0689136786. The cubic root of 505619 is about 79.6662659558. Note that the first 3 decimals are identical.

The spelling of 505619 in words is "five hundred five thousand, six hundred nineteen".