268639291 has 8 divisors (see below), whose sum is σ = 272874960. Its totient is φ = 264430848.

The previous prime is 268639249. The next prime is 268639297. The reversal of 268639291 is 192936862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 268639291 - 2²⁷ = 134421563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268639297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13555 + ... + 26851.

It is an arithmetic number, because the mean of its divisors is an integer number (34109370).

Almost surely, 2^268639291 is an apocalyptic number.

268639291 is a deficient number, since it is larger than the sum of its proper divisors (4235669).

268639291 is a wasteful number, since it uses less digits than its factorization.

268639291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13613.

The product of its digits is 279936, while the sum is 46.

The square root of 268639291 is about 16390.2193701000. The cubic root of 268639291 is about 645.2428154553.

The spelling of 268639291 in words is "two hundred sixty-eight million, six hundred thirty-nine thousand, two hundred ninety-one".