3800845891 has 2 divisors, whose sum is σ = 3800845892. Its totient is φ = 3800845890.

The previous prime is 3800845883. The next prime is 3800845901. The reversal of 3800845891 is 1985480083.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3800845891 - 2³ = 3800845883 is a prime.

It is not a weakly prime, because it can be changed into another prime (3800845871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1900422945 + 1900422946.

It is an arithmetic number, because the mean of its divisors is an integer number (1900422946).

Almost surely, 2^3800845891 is an apocalyptic number.

3800845891 is a deficient number, since it is larger than the sum of its proper divisors (1).

3800845891 is an equidigital number, since it uses as much as digits as its factorization.

3800845891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 3800845891 is about 61651.0007299152. Note that the first 3 decimals coincide. The cubic root of 3800845891 is about 1560.6065320367.

The spelling of 3800845891 in words is "three billion, eight hundred million, eight hundred forty-five thousand, eight hundred ninety-one".