268745887 has 2 divisors, whose sum is σ = 268745888. Its totient is φ = 268745886.

The previous prime is 268745879. The next prime is 268745909. The reversal of 268745887 is 788547862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268745887 - 2³ = 268745879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268745287) 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, 134372943 + 134372944.

It is an arithmetic number, because the mean of its divisors is an integer number (134372944).

Almost surely, 2^268745887 is an apocalyptic number.

268745887 is a deficient number, since it is larger than the sum of its proper divisors (1).

268745887 is an equidigital number, since it uses as much as digits as its factorization.

268745887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6021120, while the sum is 55.

The square root of 268745887 is about 16393.4708649511. The cubic root of 268745887 is about 645.3281482294.

It can be divided in two parts, 26874 and 5887, that added together give a square (32761 = 181²).

The spelling of 268745887 in words is "two hundred sixty-eight million, seven hundred forty-five thousand, eight hundred eighty-seven".