268594991 has 4 divisors (see below), whose sum is σ = 306965712. Its totient is φ = 230224272.

The previous prime is 268594981. The next prime is 268594993. The reversal of 268594991 is 199495862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 268594991 - 2¹⁰ = 268593967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268594993) 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 in 3 ways as a sum of consecutive naturals, for example, 19185350 + ... + 19185363.

It is an arithmetic number, because the mean of its divisors is an integer number (76741428).

Almost surely, 2^268594991 is an apocalyptic number.

268594991 is a deficient number, since it is larger than the sum of its proper divisors (38370721).

268594991 is an equidigital number, since it uses as much as digits as its factorization.

268594991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38370720.

The product of its digits is 1399680, while the sum is 53.

The square root of 268594991 is about 16388.8678986683. The cubic root of 268594991 is about 645.2073455531.

The spelling of 268594991 in words is "two hundred sixty-eight million, five hundred ninety-four thousand, nine hundred ninety-one".