3978971427 has 8 divisors (see below), whose sum is σ = 5476433920. Its totient is φ = 2567078280.

The previous prime is 3978971413. The next prime is 3978971429. The reversal of 3978971427 is 7241798793.

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

It is not a de Polignac number, because 3978971427 - 2¹⁶ = 3978905891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3978971429) 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, 21392227 + ... + 21392412.

It is an arithmetic number, because the mean of its divisors is an integer number (684554240).

Almost surely, 2^3978971427 is an apocalyptic number.

3978971427 is a deficient number, since it is larger than the sum of its proper divisors (1497462493).

3978971427 is a wasteful number, since it uses less digits than its factorization.

3978971427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42784673.

The product of its digits is 5334336, while the sum is 57.

The square root of 3978971427 is about 63079.0886665304. The cubic root of 3978971427 is about 1584.6144314521.

The spelling of 3978971427 in words is "three billion, nine hundred seventy-eight million, nine hundred seventy-one thousand, four hundred twenty-seven".