268675991 has 2 divisors, whose sum is σ = 268675992. Its totient is φ = 268675990.

The previous prime is 268675987. The next prime is 268676021. The reversal of 268675991 is 199576862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268675991 - 2² = 268675987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268675931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134337995 + 134337996.

It is an arithmetic number, because the mean of its divisors is an integer number (134337996).

Almost surely, 2^268675991 is an apocalyptic number.

268675991 is a deficient number, since it is larger than the sum of its proper divisors (1).

268675991 is an equidigital number, since it uses as much as digits as its factorization.

268675991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 53.

The square root of 268675991 is about 16391.3389019933. The cubic root of 268675991 is about 645.2721972742.

The spelling of 268675991 in words is "two hundred sixty-eight million, six hundred seventy-five thousand, nine hundred ninety-one".