3861997757 has 2 divisors, whose sum is σ = 3861997758. Its totient is φ = 3861997756.

The previous prime is 3861997739. The next prime is 3861997771. The reversal of 3861997757 is 7577991683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3786063961 + 75933796 = 61531^2 + 8714^2 .

It is a cyclic number.

It is not a de Polignac number, because 3861997757 - 2²⁶ = 3794888893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3861997757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3861297757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1930998878 + 1930998879.

It is an arithmetic number, because the mean of its divisors is an integer number (1930998879).

Almost surely, 2^3861997757 is an apocalyptic number.

It is an amenable number.

3861997757 is a deficient number, since it is larger than the sum of its proper divisors (1).

3861997757 is an equidigital number, since it uses as much as digits as its factorization.

3861997757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20003760, while the sum is 62.

The square root of 3861997757 is about 62144.9737066482. The cubic root of 3861997757 is about 1568.9315836601.

The spelling of 3861997757 in words is "three billion, eight hundred sixty-one million, nine hundred ninety-seven thousand, seven hundred fifty-seven".