268937209 has 4 divisors (see below), whose sum is σ = 268980340. Its totient is φ = 268894080.

The previous prime is 268937203. The next prime is 268937231. The reversal of 268937209 is 902739862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902739862 = 2 ⋅451369931.

It can be written as a sum of positive squares in 2 ways, for example, as 180633600 + 88303609 = 13440^2 + 9397^2 .

It is a cyclic number.

It is not a de Polignac number, because 268937209 - 2⁵ = 268937177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268937203) 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, 10224 + ... + 25345.

It is an arithmetic number, because the mean of its divisors is an integer number (67245085).

Almost surely, 2^268937209 is an apocalyptic number.

It is an amenable number.

268937209 is a deficient number, since it is larger than the sum of its proper divisors (43131).

268937209 is an equidigital number, since it uses as much as digits as its factorization.

268937209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43130.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 268937209 is about 16399.3051377185. The cubic root of 268937209 is about 645.4812497166.

The spelling of 268937209 in words is "two hundred sixty-eight million, nine hundred thirty-seven thousand, two hundred nine".