3941636729 has 2 divisors, whose sum is σ = 3941636730. Its totient is φ = 3941636728.

The previous prime is 3941636719. The next prime is 3941636747. The reversal of 3941636729 is 9276361493.

3941636729 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3862871104 + 78765625 = 62152^2 + 8875^2 .

It is a cyclic number.

It is not a de Polignac number, because 3941636729 - 2²⁰ = 3940588153 is a prime.

It is not a weakly prime, because it can be changed into another prime (3941636719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1970818364 + 1970818365.

It is an arithmetic number, because the mean of its divisors is an integer number (1970818365).

Almost surely, 2^3941636729 is an apocalyptic number.

It is an amenable number.

3941636729 is a deficient number, since it is larger than the sum of its proper divisors (1).

3941636729 is an equidigital number, since it uses as much as digits as its factorization.

3941636729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 50.

The square root of 3941636729 is about 62782.4555827502. The cubic root of 3941636729 is about 1579.6427020147.

The spelling of 3941636729 in words is "three billion, nine hundred forty-one million, six hundred thirty-six thousand, seven hundred twenty-nine".