263933081 has 2 divisors, whose sum is σ = 263933082. Its totient is φ = 263933080.

The previous prime is 263933063. The next prime is 263933093. The reversal of 263933081 is 180339362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161518681 + 102414400 = 12709^2 + 10120^2 .

It is a cyclic number.

It is not a de Polignac number, because 263933081 - 2²⁶ = 196824217 is a prime.

It is a super-2 number, since 2×263933081² = 139321342492305122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (263933281) 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, 131966540 + 131966541.

It is an arithmetic number, because the mean of its divisors is an integer number (131966541).

Almost surely, 2^263933081 is an apocalyptic number.

It is an amenable number.

263933081 is a deficient number, since it is larger than the sum of its proper divisors (1).

263933081 is an equidigital number, since it uses as much as digits as its factorization.

263933081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 263933081 is about 16246.0173888864. The cubic root of 263933081 is about 641.4526581384.

The spelling of 263933081 in words is "two hundred sixty-three million, nine hundred thirty-three thousand, eighty-one".