268647769 has 4 divisors (see below), whose sum is σ = 289312996. Its totient is φ = 247982544.

The previous prime is 268647763. The next prime is 268647791. The reversal of 268647769 is 967746862.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36481600 + 232166169 = 6040^2 + 15237^2 .

It is a cyclic number.

It is not a de Polignac number, because 268647769 - 2⁵ = 268647737 is a prime.

It is a super-2 number, since 2×268647769² = 144343247577354722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268647763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10332594 + ... + 10332619.

It is an arithmetic number, because the mean of its divisors is an integer number (72328249).

Almost surely, 2^268647769 is an apocalyptic number.

It is an amenable number.

268647769 is a deficient number, since it is larger than the sum of its proper divisors (20665227).

268647769 is a wasteful number, since it uses less digits than its factorization.

268647769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20665226.

The product of its digits is 6096384, while the sum is 55.

The square root of 268647769 is about 16390.4779979109. The cubic root of 268647769 is about 645.2496031333.

The spelling of 268647769 in words is "two hundred sixty-eight million, six hundred forty-seven thousand, seven hundred sixty-nine".