505145477 has 2 divisors, whose sum is σ = 505145478. Its totient is φ = 505145476.

The previous prime is 505145413. The next prime is 505145503. The reversal of 505145477 is 774541505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392594596 + 112550881 = 19814^2 + 10609^2 .

It is a cyclic number.

It is not a de Polignac number, because 505145477 - 2⁶ = 505145413 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505145477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505145177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252572738 + 252572739.

It is an arithmetic number, because the mean of its divisors is an integer number (252572739).

Almost surely, 2^505145477 is an apocalyptic number.

It is an amenable number.

505145477 is a deficient number, since it is larger than the sum of its proper divisors (1).

505145477 is an equidigital number, since it uses as much as digits as its factorization.

505145477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98000, while the sum is 38.

The square root of 505145477 is about 22475.4416419344. The cubic root of 505145477 is about 796.4138846785.

The spelling of 505145477 in words is "five hundred five million, one hundred forty-five thousand, four hundred seventy-seven".