3971427889 has 16 divisors (see below), whose sum is σ = 4667826240. Its totient is φ = 3331172160.

The previous prime is 3971427877. The next prime is 3971427931. The reversal of 3971427889 is 9887241793.

It is a cyclic number.

It is not a de Polignac number, because 3971427889 - 2⁵ = 3971427857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3971427289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411214 + ... + 420760.

It is an arithmetic number, because the mean of its divisors is an integer number (291739140).

Almost surely, 2^3971427889 is an apocalyptic number.

It is an amenable number.

3971427889 is a deficient number, since it is larger than the sum of its proper divisors (696398351).

3971427889 is a wasteful number, since it uses less digits than its factorization.

3971427889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12480.

The product of its digits is 6096384, while the sum is 58.

The square root of 3971427889 is about 63019.2660144499. The cubic root of 3971427889 is about 1583.6124001946.

The spelling of 3971427889 in words is "three billion, nine hundred seventy-one million, four hundred twenty-seven thousand, eight hundred eighty-nine".