263382421 has 2 divisors, whose sum is σ = 263382422. Its totient is φ = 263382420.

The previous prime is 263382397. The next prime is 263382529. The reversal of 263382421 is 124283362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135466321 + 127916100 = 11639^2 + 11310^2 .

It is a cyclic number.

It is not a de Polignac number, because 263382421 - 2²⁵ = 229827989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263386421) 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, 131691210 + 131691211.

It is an arithmetic number, because the mean of its divisors is an integer number (131691211).

Almost surely, 2^263382421 is an apocalyptic number.

It is an amenable number.

263382421 is a deficient number, since it is larger than the sum of its proper divisors (1).

263382421 is an equidigital number, since it uses as much as digits as its factorization.

263382421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 263382421 is about 16229.0610017955. The cubic root of 263382421 is about 641.0062466789.

The spelling of 263382421 in words is "two hundred sixty-three million, three hundred eighty-two thousand, four hundred twenty-one".