268685689 has 4 divisors (see below), whose sum is σ = 268736400. Its totient is φ = 268634980.

The previous prime is 268685657. The next prime is 268685717. The reversal of 268685689 is 986586862.

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 not a de Polignac number, because 268685689 - 2⁵ = 268685657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268685489) 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, 16339 + ... + 28360.

It is an arithmetic number, because the mean of its divisors is an integer number (67184100).

Almost surely, 2^268685689 is an apocalyptic number.

It is an amenable number.

268685689 is a deficient number, since it is larger than the sum of its proper divisors (50711).

268685689 is an equidigital number, since it uses as much as digits as its factorization.

268685689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50710.

The product of its digits is 9953280, while the sum is 58.

The square root of 268685689 is about 16391.6347262865. The cubic root of 268685689 is about 645.2799609930.

The spelling of 268685689 in words is "two hundred sixty-eight million, six hundred eighty-five thousand, six hundred eighty-nine".