505200404689 has 2 divisors, whose sum is σ = 505200404690. Its totient is φ = 505200404688.

The previous prime is 505200404627. The next prime is 505200404693. The reversal of 505200404689 is 986404002505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 361856387025 + 143344017664 = 601545^2 + 378608^2 .

It is a cyclic number.

It is not a de Polignac number, because 505200404689 - 2³⁷ = 367761451217 is a prime.

It is not a weakly prime, because it can be changed into another prime (505200404389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252600202344 + 252600202345.

It is an arithmetic number, because the mean of its divisors is an integer number (252600202345).

Almost surely, 2^505200404689 is an apocalyptic number.

It is an amenable number.

505200404689 is a deficient number, since it is larger than the sum of its proper divisors (1).

505200404689 is an equidigital number, since it uses as much as digits as its factorization.

505200404689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 505200404689 in words is "five hundred five billion, two hundred million, four hundred four thousand, six hundred eighty-nine".