263001601 has 2 divisors, whose sum is σ = 263001602. Its totient is φ = 263001600.

The previous prime is 263001589. The next prime is 263001643. The reversal of 263001601 is 106100362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256032001 + 6969600 = 16001^2 + 2640^2 .

It is a cyclic number.

It is not a de Polignac number, because 263001601 - 2¹⁵ = 262968833 is a prime.

It is not a weakly prime, because it can be changed into another prime (263001671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131500800 + 131500801.

It is an arithmetic number, because the mean of its divisors is an integer number (131500801).

Almost surely, 2^263001601 is an apocalyptic number.

It is an amenable number.

263001601 is a deficient number, since it is larger than the sum of its proper divisors (1).

263001601 is an equidigital number, since it uses as much as digits as its factorization.

263001601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 263001601 is about 16217.3241010963. The cubic root of 263001601 is about 640.6971577844.

Adding to 263001601 its reverse (106100362), we get a palindrome (369101963).

The spelling of 263001601 in words is "two hundred sixty-three million, one thousand, six hundred one".