505200404389 has 2 divisors, whose sum is σ = 505200404390. Its totient is φ = 505200404388.

The previous prime is 505200404281. The next prime is 505200404417. The reversal of 505200404389 is 983404002505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432713996100 + 72486408289 = 657810^2 + 269233^2 .

It is a cyclic number.

It is not a de Polignac number, because 505200404389 - 2²⁷ = 505066186661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505200404689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252600202194 + 252600202195.

It is an arithmetic number, because the mean of its divisors is an integer number (252600202195).

Almost surely, 2^505200404389 is an apocalyptic number.

It is an amenable number.

505200404389 is a deficient number, since it is larger than the sum of its proper divisors (1).

505200404389 is an equidigital number, since it uses as much as digits as its factorization.

505200404389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 505200404389 in words is "five hundred five billion, two hundred million, four hundred four thousand, three hundred eighty-nine".