3788121691 has 2 divisors, whose sum is σ = 3788121692. Its totient is φ = 3788121690.

The previous prime is 3788121587. The next prime is 3788121703. The reversal of 3788121691 is 1961218873.

It is a happy number.

3788121691 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 3788121691 - 2⁷ = 3788121563 is a prime.

It is not a weakly prime, because it can be changed into another prime (3788121791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1894060845 + 1894060846.

It is an arithmetic number, because the mean of its divisors is an integer number (1894060846).

Almost surely, 2^3788121691 is an apocalyptic number.

3788121691 is a deficient number, since it is larger than the sum of its proper divisors (1).

3788121691 is an equidigital number, since it uses as much as digits as its factorization.

3788121691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 46.

The square root of 3788121691 is about 61547.7188123167. The cubic root of 3788121691 is about 1558.8630894234.

The spelling of 3788121691 in words is "three billion, seven hundred eighty-eight million, one hundred twenty-one thousand, six hundred ninety-one".