3861636329 has 2 divisors, whose sum is σ = 3861636330. Its totient is φ = 3861636328.

The previous prime is 3861636299. The next prime is 3861636341. The reversal of 3861636329 is 9236361683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3773276329 + 88360000 = 61427^2 + 9400^2 .

It is a cyclic number.

It is not a de Polignac number, because 3861636329 - 2¹² = 3861632233 is a prime.

It is not a weakly prime, because it can be changed into another prime (3861636379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1930818164 + 1930818165.

It is an arithmetic number, because the mean of its divisors is an integer number (1930818165).

Almost surely, 2^3861636329 is an apocalyptic number.

It is an amenable number.

3861636329 is a deficient number, since it is larger than the sum of its proper divisors (1).

3861636329 is an equidigital number, since it uses as much as digits as its factorization.

3861636329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 47.

The square root of 3861636329 is about 62142.0656962737. The cubic root of 3861636329 is about 1568.8826389143.

The spelling of 3861636329 in words is "three billion, eight hundred sixty-one million, six hundred thirty-six thousand, three hundred twenty-nine".