263106401 has 2 divisors, whose sum is σ = 263106402. Its totient is φ = 263106400.

The previous prime is 263106397. The next prime is 263106421. The reversal of 263106401 is 104601362.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251539600 + 11566801 = 15860^2 + 3401^2 .

It is a cyclic number.

It is not a de Polignac number, because 263106401 - 2² = 263106397 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (263106421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131553200 + 131553201.

It is an arithmetic number, because the mean of its divisors is an integer number (131553201).

Almost surely, 2^263106401 is an apocalyptic number.

It is an amenable number.

263106401 is a deficient number, since it is larger than the sum of its proper divisors (1).

263106401 is an equidigital number, since it uses as much as digits as its factorization.

263106401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 263106401 is about 16220.5548918648. The cubic root of 263106401 is about 640.7822474382.

Adding to 263106401 its reverse (104601362), we get a palindrome (367707763).

The spelling of 263106401 in words is "two hundred sixty-three million, one hundred six thousand, four hundred one".