268779389 has 4 divisors (see below), whose sum is σ = 270264540. Its totient is φ = 267294240.

The previous prime is 268779383. The next prime is 268779437. The reversal of 268779389 is 983977862.

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 21252100 + 247527289 = 4610^2 + 15733^2 .

It is a cyclic number.

It is not a de Polignac number, because 268779389 - 2⁴ = 268779373 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 (268779383) 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, 742304 + ... + 742665.

It is an arithmetic number, because the mean of its divisors is an integer number (67566135).

Almost surely, 2^268779389 is an apocalyptic number.

It is an amenable number.

268779389 is a deficient number, since it is larger than the sum of its proper divisors (1485151).

268779389 is a wasteful number, since it uses less digits than its factorization.

268779389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485150.

The product of its digits is 9144576, while the sum is 59.

The square root of 268779389 is about 16394.4926423479. The cubic root of 268779389 is about 645.3549627611.

The spelling of 268779389 in words is "two hundred sixty-eight million, seven hundred seventy-nine thousand, three hundred eighty-nine".