4006979971 has 4 divisors (see below), whose sum is σ = 4092234912. Its totient is φ = 3921725032.

The previous prime is 4006979959. The next prime is 4006980007. The reversal of 4006979971 is 1799796004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4006979971 - 2¹⁹ = 4006455683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4006979071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42627400 + ... + 42627493.

It is an arithmetic number, because the mean of its divisors is an integer number (1023058728).

Almost surely, 2^4006979971 is an apocalyptic number.

4006979971 is a deficient number, since it is larger than the sum of its proper divisors (85254941).

4006979971 is an equidigital number, since it uses as much as digits as its factorization.

4006979971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85254940.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 4006979971 is about 63300.7106674167. The cubic root of 4006979971 is about 1588.3238498600.

The spelling of 4006979971 in words is "four billion, six million, nine hundred seventy-nine thousand, nine hundred seventy-one".