268821023 has 2 divisors, whose sum is σ = 268821024. Its totient is φ = 268821022.

The previous prime is 268821013. The next prime is 268821037. The reversal of 268821023 is 320128862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268821023 - 2⁸ = 268820767 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268821013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134410511 + 134410512.

It is an arithmetic number, because the mean of its divisors is an integer number (134410512).

Almost surely, 2^268821023 is an apocalyptic number.

268821023 is a deficient number, since it is larger than the sum of its proper divisors (1).

268821023 is an equidigital number, since it uses as much as digits as its factorization.

268821023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 268821023 is about 16395.7623488510. The cubic root of 268821023 is about 645.3882829268.

Adding to 268821023 its reverse (320128862), we get a palindrome (588949885).

The spelling of 268821023 in words is "two hundred sixty-eight million, eight hundred twenty-one thousand, twenty-three".