505403383 has 2 divisors, whose sum is σ = 505403384. Its totient is φ = 505403382.

The previous prime is 505403377. The next prime is 505403399. The reversal of 505403383 is 383304505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505403383 - 2¹⁷ = 505272311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505403333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252701691 + 252701692.

It is an arithmetic number, because the mean of its divisors is an integer number (252701692).

Almost surely, 2^505403383 is an apocalyptic number.

505403383 is a deficient number, since it is larger than the sum of its proper divisors (1).

505403383 is an equidigital number, since it uses as much as digits as its factorization.

505403383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 505403383 is about 22481.1784166222. The cubic root of 505403383 is about 796.5494000779.

Adding to 505403383 its reverse (383304505), we get a palindrome (888707888).

The spelling of 505403383 in words is "five hundred five million, four hundred three thousand, three hundred eighty-three".