3861799309 has 2 divisors, whose sum is σ = 3861799310. Its totient is φ = 3861799308.

The previous prime is 3861799303. The next prime is 3861799313. The reversal of 3861799309 is 9039971683.

3861799309 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 can be written as a sum of positive squares in only one way, i.e., 3167213284 + 694586025 = 56278^2 + 26355^2 .

It is a cyclic number.

It is not a de Polignac number, because 3861799309 - 2²⁷ = 3727581581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3861799309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3861799303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1930899654 + 1930899655.

It is an arithmetic number, because the mean of its divisors is an integer number (1930899655).

Almost surely, 2^3861799309 is an apocalyptic number.

It is an amenable number.

3861799309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3861799309 is an equidigital number, since it uses as much as digits as its factorization.

3861799309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The square root of 3861799309 is about 62143.3770324723. The cubic root of 3861799309 is about 1568.9047101188.

The spelling of 3861799309 in words is "three billion, eight hundred sixty-one million, seven hundred ninety-nine thousand, three hundred nine".