505878433 has 2 divisors, whose sum is σ = 505878434. Its totient is φ = 505878432.

The previous prime is 505878421. The next prime is 505878463. The reversal of 505878433 is 334878505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 488763664 + 17114769 = 22108^2 + 4137^2 .

It is a cyclic number.

It is not a de Polignac number, because 505878433 - 2⁹ = 505877921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505878433.

It is not a weakly prime, because it can be changed into another prime (505878413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252939216 + 252939217.

It is an arithmetic number, because the mean of its divisors is an integer number (252939217).

Almost surely, 2^505878433 is an apocalyptic number.

It is an amenable number.

505878433 is a deficient number, since it is larger than the sum of its proper divisors (1).

505878433 is an equidigital number, since it uses as much as digits as its factorization.

505878433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 505878433 is about 22491.7414399152. The cubic root of 505878433 is about 796.7988920736.

The spelling of 505878433 in words is "five hundred five million, eight hundred seventy-eight thousand, four hundred thirty-three".