263209241 has 2 divisors, whose sum is σ = 263209242. Its totient is φ = 263209240.

The previous prime is 263209211. The next prime is 263209273. The reversal of 263209241 is 142902362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252937216 + 10272025 = 15904^2 + 3205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263209241 is a prime.

It is not a weakly prime, because it can be changed into another prime (263209211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131604620 + 131604621.

It is an arithmetic number, because the mean of its divisors is an integer number (131604621).

Almost surely, 2^263209241 is an apocalyptic number.

It is an amenable number.

263209241 is a deficient number, since it is larger than the sum of its proper divisors (1).

263209241 is an equidigital number, since it uses as much as digits as its factorization.

263209241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 263209241 is about 16223.7246340044. The cubic root of 263209241 is about 640.8657237582.

The spelling of 263209241 in words is "two hundred sixty-three million, two hundred nine thousand, two hundred forty-one".