3939645041 has 16 divisors (see below), whose sum is σ = 4405963200. Its totient is φ = 3506182848.

The previous prime is 3939645037. The next prime is 3939645067. The reversal of 3939645041 is 1405469393.

It is a cyclic number.

It is not a de Polignac number, because 3939645041 - 2² = 3939645037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3939644983 and 3939645001.

It is not an unprimeable number, because it can be changed into a prime (3939645001) 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 in 15 ways as a sum of consecutive naturals, for example, 76235 + ... + 117008.

It is an arithmetic number, because the mean of its divisors is an integer number (275372700).

Almost surely, 2^3939645041 is an apocalyptic number.

It is an amenable number.

3939645041 is a deficient number, since it is larger than the sum of its proper divisors (466318159).

3939645041 is a wasteful number, since it uses less digits than its factorization.

3939645041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193328.

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 3939645041 is about 62766.5917586737. The cubic root of 3939645041 is about 1579.3765955137.

The spelling of 3939645041 in words is "three billion, nine hundred thirty-nine million, six hundred forty-five thousand, forty-one".