268408169 has 4 divisors (see below), whose sum is σ = 272957520. Its totient is φ = 263858820.

The previous prime is 268408163. The next prime is 268408171. The reversal of 268408169 is 961804862.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268408169 is a prime.

It is a super-2 number, since 2×268408169² = 144085890371865122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (268408163) 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, 2274587 + ... + 2274704.

It is an arithmetic number, because the mean of its divisors is an integer number (68239380).

Almost surely, 2^268408169 is an apocalyptic number.

It is an amenable number.

268408169 is a deficient number, since it is larger than the sum of its proper divisors (4549351).

268408169 is an equidigital number, since it uses as much as digits as its factorization.

268408169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4549350.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 268408169 is about 16383.1672456824. The cubic root of 268408169 is about 645.0577189299.

The spelling of 268408169 in words is "two hundred sixty-eight million, four hundred eight thousand, one hundred sixty-nine".