263800057 has 2 divisors, whose sum is σ = 263800058. Its totient is φ = 263800056.

The previous prime is 263799989. The next prime is 263800063. The reversal of 263800057 is 750008362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240529081 + 23270976 = 15509^2 + 4824^2 .

It is a cyclic number.

It is not a de Polignac number, because 263800057 - 2¹¹ = 263798009 is a prime.

It is not a weakly prime, because it can be changed into another prime (263800357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131900028 + 131900029.

It is an arithmetic number, because the mean of its divisors is an integer number (131900029).

Almost surely, 2^263800057 is an apocalyptic number.

It is an amenable number.

263800057 is a deficient number, since it is larger than the sum of its proper divisors (1).

263800057 is an equidigital number, since it uses as much as digits as its factorization.

263800057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 263800057 is about 16241.9228233605. The cubic root of 263800057 is about 641.3448745827.

It can be divided in two parts, 26 and 3800057, that added together give a palindrome (3800083).

The spelling of 263800057 in words is "two hundred sixty-three million, eight hundred thousand, fifty-seven".