3868839691 has 2 divisors, whose sum is σ = 3868839692. Its totient is φ = 3868839690.

The previous prime is 3868839659. The next prime is 3868839739. The reversal of 3868839691 is 1969388683.

It is a weak prime.

It is an emirp because it is prime and its reverse (1969388683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3868839691 - 2⁵ = 3868839659 is a prime.

It is not a weakly prime, because it can be changed into another prime (3868833691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1934419845 + 1934419846.

It is an arithmetic number, because the mean of its divisors is an integer number (1934419846).

Almost surely, 2^3868839691 is an apocalyptic number.

3868839691 is a deficient number, since it is larger than the sum of its proper divisors (1).

3868839691 is an equidigital number, since it uses as much as digits as its factorization.

3868839691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13436928, while the sum is 61.

The square root of 3868839691 is about 62199.9975160771. The cubic root of 3868839691 is about 1569.8575460022.

The spelling of 3868839691 in words is "three billion, eight hundred sixty-eight million, eight hundred thirty-nine thousand, six hundred ninety-one".