263401 has 2 divisors, whose sum is σ = 263402. Its totient is φ = 263400.

The previous prime is 263399. The next prime is 263411. The reversal of 263401 is 104362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249001 + 14400 = 499^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 263401 - 2¹ = 263399 is a prime.

Together with 263399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (263411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131700 + 131701.

It is an arithmetic number, because the mean of its divisors is an integer number (131701).

2²⁶³⁴⁰¹ is an apocalyptic number.

It is an amenable number.

263401 is a deficient number, since it is larger than the sum of its proper divisors (1).

263401 is an equidigital number, since it uses as much as digits as its factorization.

263401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 263401 is about 513.2260710447. The cubic root of 263401 is about 64.1021318521.

Adding to 263401 its reverse (104362), we get a palindrome (367763).

The spelling of 263401 in words is "two hundred sixty-three thousand, four hundred one".