263780269 has 2 divisors, whose sum is σ = 263780270. Its totient is φ = 263780268.

The previous prime is 263780263. The next prime is 263780303. The reversal of 263780269 is 962087362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242269225 + 21511044 = 15565^2 + 4638^2 .

It is a cyclic number.

It is not a de Polignac number, because 263780269 - 2²⁷ = 129562541 is a prime.

It is a super-2 number, since 2×263780269² = 139160060627424722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263780263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131890134 + 131890135.

It is an arithmetic number, because the mean of its divisors is an integer number (131890135).

Almost surely, 2^263780269 is an apocalyptic number.

It is an amenable number.

263780269 is a deficient number, since it is larger than the sum of its proper divisors (1).

263780269 is an equidigital number, since it uses as much as digits as its factorization.

263780269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 263780269 is about 16241.3136476087. The cubic root of 263780269 is about 641.3288381322.

The spelling of 263780269 in words is "two hundred sixty-three million, seven hundred eighty thousand, two hundred sixty-nine".