4068781369 has 9 divisors (see below), whose sum is σ = 4101379951. Its totient is φ = 4036441360.

The previous prime is 4068781361. The next prime is 4068781393. The reversal of 4068781369 is 9631878604.

It is a happy number.

The square root of 4068781369 is 63787.

It is a perfect power (a square), and thus also a powerful number.

4068781369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2749638969 + 1319142400 = 52437^2 + 36320^2 .

It is not a de Polignac number, because 4068781369 - 2³ = 4068781361 is a prime.

It is a super-2 number, since 2×4068781369² = 33109963657443028322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4068781361) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14479509 + ... + 14479789.

Almost surely, 2^4068781369 is an apocalyptic number.

4068781369 is the 63787-th square number.

4068781369 is the 31894-th centered octagonal number.

It is an amenable number.

4068781369 is a deficient number, since it is larger than the sum of its proper divisors (32598582).

4068781369 is an frugal number, since it uses more digits than its factorization.

4068781369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The cubic root of 4068781369 is about 1596.4480279410.

The spelling of 4068781369 in words is "four billion, sixty-eight million, seven hundred eighty-one thousand, three hundred sixty-nine".