263442401 has 2 divisors, whose sum is σ = 263442402. Its totient is φ = 263442400.

The previous prime is 263442373. The next prime is 263442407. The reversal of 263442401 is 104244362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240870400 + 22572001 = 15520^2 + 4751^2 .

It is a cyclic number.

It is not a de Polignac number, because 263442401 - 2¹⁰ = 263441377 is a prime.

It is not a weakly prime, because it can be changed into another prime (263442407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131721200 + 131721201.

It is an arithmetic number, because the mean of its divisors is an integer number (131721201).

Almost surely, 2^263442401 is an apocalyptic number.

It is an amenable number.

263442401 is a deficient number, since it is larger than the sum of its proper divisors (1).

263442401 is an equidigital number, since it uses as much as digits as its factorization.

263442401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 263442401 is about 16230.9088162062. The cubic root of 263442401 is about 641.0549017060.

Adding to 263442401 its reverse (104244362), we get a palindrome (367686763).

The spelling of 263442401 in words is "two hundred sixty-three million, four hundred forty-two thousand, four hundred one".