4068786991 has 2 divisors, whose sum is σ = 4068786992. Its totient is φ = 4068786990.

The previous prime is 4068786973. The next prime is 4068787003. The reversal of 4068786991 is 1996878604.

4068786991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4068786991 - 2¹¹ = 4068784943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4068786941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2034393495 + 2034393496.

It is an arithmetic number, because the mean of its divisors is an integer number (2034393496).

Almost surely, 2^4068786991 is an apocalyptic number.

4068786991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4068786991 is an equidigital number, since it uses as much as digits as its factorization.

4068786991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The square root of 4068786991 is about 63787.0440685254. The cubic root of 4068786991 is about 1596.4487632330.

The spelling of 4068786991 in words is "four billion, sixty-eight million, seven hundred eighty-six thousand, nine hundred ninety-one".