263530417 has 2 divisors, whose sum is σ = 263530418. Its totient is φ = 263530416.

The previous prime is 263530409. The next prime is 263530523. The reversal of 263530417 is 714035362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151191616 + 112338801 = 12296^2 + 10599^2 .

It is a cyclic number.

It is not a de Polignac number, because 263530417 - 2³ = 263530409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (263530117) 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, 131765208 + 131765209.

It is an arithmetic number, because the mean of its divisors is an integer number (131765209).

Almost surely, 2^263530417 is an apocalyptic number.

It is an amenable number.

263530417 is a deficient number, since it is larger than the sum of its proper divisors (1).

263530417 is an equidigital number, since it uses as much as digits as its factorization.

263530417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 263530417 is about 16233.6199598241. The cubic root of 263530417 is about 641.1262858182.

Adding to 263530417 its reverse (714035362), we get a palindrome (977565779).

The spelling of 263530417 in words is "two hundred sixty-three million, five hundred thirty thousand, four hundred seventeen".