495998257 has 2 divisors, whose sum is σ = 495998258. Its totient is φ = 495998256.

The previous prime is 495998207. The next prime is 495998263. The reversal of 495998257 is 752899594.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428034721 + 67963536 = 20689^2 + 8244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-495998257 is a prime.

It is not a weakly prime, because it can be changed into another prime (495998207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247999128 + 247999129.

It is an arithmetic number, because the mean of its divisors is an integer number (247999129).

Almost surely, 2^495998257 is an apocalyptic number.

It is an amenable number.

495998257 is a deficient number, since it is larger than the sum of its proper divisors (1).

495998257 is an equidigital number, since it uses as much as digits as its factorization.

495998257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8164800, while the sum is 58.

The square root of 495998257 is about 22271.0183197805. The cubic root of 495998257 is about 791.5773947031.

The spelling of 495998257 in words is "four hundred ninety-five million, nine hundred ninety-eight thousand, two hundred fifty-seven".