3943078861 has 8 divisors (see below), whose sum is σ = 3958296320. Its totient is φ = 3927886992.

The previous prime is 3943078859. The next prime is 3943078871. The reversal of 3943078861 is 1688703493.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3943078861 - 2¹ = 3943078859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3943078831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337036 + ... + 348538.

It is an arithmetic number, because the mean of its divisors is an integer number (494787040).

Almost surely, 2^3943078861 is an apocalyptic number.

It is an amenable number.

3943078861 is a deficient number, since it is larger than the sum of its proper divisors (15217459).

3943078861 is a wasteful number, since it uses less digits than its factorization.

3943078861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12795.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 3943078861 is about 62793.9396836988. The cubic root of 3943078861 is about 1579.8353272004.

The spelling of 3943078861 in words is "three billion, nine hundred forty-three million, seventy-eight thousand, eight hundred sixty-one".