3861225779 has 2 divisors, whose sum is σ = 3861225780. Its totient is φ = 3861225778.

The previous prime is 3861225773. The next prime is 3861225803. The reversal of 3861225779 is 9775221683.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3861225779 - 2⁸ = 3861225523 is a prime.

It is not a weakly prime, because it can be changed into another prime (3861225773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1930612889 + 1930612890.

It is an arithmetic number, because the mean of its divisors is an integer number (1930612890).

Almost surely, 2^3861225779 is an apocalyptic number.

3861225779 is a deficient number, since it is larger than the sum of its proper divisors (1).

3861225779 is an equidigital number, since it uses as much as digits as its factorization.

3861225779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 50.

The square root of 3861225779 is about 62138.7622905381. The cubic root of 3861225779 is about 1568.8270383399.

The spelling of 3861225779 in words is "three billion, eight hundred sixty-one million, two hundred twenty-five thousand, seven hundred seventy-nine".