268686197 has 4 divisors (see below), whose sum is σ = 289354380. Its totient is φ = 248018016.

The previous prime is 268686191. The next prime is 268686221. The reversal of 268686197 is 791686862.

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 41460721 + 227225476 = 6439^2 + 15074^2 .

It is a cyclic number.

It is not a de Polignac number, because 268686197 - 2¹⁰ = 268685173 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 (268686191) 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, 10334072 + ... + 10334097.

It is an arithmetic number, because the mean of its divisors is an integer number (72338595).

Almost surely, 2^268686197 is an apocalyptic number.

It is an amenable number.

268686197 is a deficient number, since it is larger than the sum of its proper divisors (20668183).

268686197 is a wasteful number, since it uses less digits than its factorization.

268686197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20668182.

The product of its digits is 1741824, while the sum is 53.

The square root of 268686197 is about 16391.6502219880. The cubic root of 268686197 is about 645.2803676664.

The spelling of 268686197 in words is "two hundred sixty-eight million, six hundred eighty-six thousand, one hundred ninety-seven".