263257873 has 2 divisors, whose sum is σ = 263257874. Its totient is φ = 263257872.

The previous prime is 263257831. The next prime is 263257879. The reversal of 263257873 is 378752362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196476289 + 66781584 = 14017^2 + 8172^2 .

It is a cyclic number.

It is not a de Polignac number, because 263257873 - 2⁹ = 263257361 is a prime.

It is not a weakly prime, because it can be changed into another prime (263257879) 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, 131628936 + 131628937.

It is an arithmetic number, because the mean of its divisors is an integer number (131628937).

Almost surely, 2^263257873 is an apocalyptic number.

It is an amenable number.

263257873 is a deficient number, since it is larger than the sum of its proper divisors (1).

263257873 is an equidigital number, since it uses as much as digits as its factorization.

263257873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 43.

The square root of 263257873 is about 16225.2233574765. The cubic root of 263257873 is about 640.9051912968.

The spelling of 263257873 in words is "two hundred sixty-three million, two hundred fifty-seven thousand, eight hundred seventy-three".