263742247 has 2 divisors, whose sum is σ = 263742248. Its totient is φ = 263742246.

The previous prime is 263742229. The next prime is 263742289. The reversal of 263742247 is 742247362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263742247 - 2⁷ = 263742119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263740247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131871123 + 131871124.

It is an arithmetic number, because the mean of its divisors is an integer number (131871124).

Almost surely, 2^263742247 is an apocalyptic number.

263742247 is a deficient number, since it is larger than the sum of its proper divisors (1).

263742247 is an equidigital number, since it uses as much as digits as its factorization.

263742247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 37.

The square root of 263742247 is about 16240.1430720299. The cubic root of 263742247 is about 641.2980223616.

The spelling of 263742247 in words is "two hundred sixty-three million, seven hundred forty-two thousand, two hundred forty-seven".