268719905 has 4 divisors (see below), whose sum is σ = 322463892. Its totient is φ = 214975920.

The previous prime is 268719859. The next prime is 268719917. The reversal of 268719905 is 509917862.

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 32913169 + 235806736 = 5737^2 + 15356^2 .

It is not a de Polignac number, because 268719905 - 2¹⁴ = 268703521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 268719905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26871986 + ... + 26871995.

It is an arithmetic number, because the mean of its divisors is an integer number (80615973).

Almost surely, 2^268719905 is an apocalyptic number.

It is an amenable number.

268719905 is a deficient number, since it is larger than the sum of its proper divisors (53743987).

268719905 is an equidigital number, since it uses as much as digits as its factorization.

268719905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53743986.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 268719905 is about 16392.6783961621. The cubic root of 268719905 is about 645.3073510661.

The spelling of 268719905 in words is "two hundred sixty-eight million, seven hundred nineteen thousand, nine hundred five".