3989971 has 8 divisors (see below), whose sum is σ = 4253184. Its totient is φ = 3734280.

The previous prime is 3989963. The next prime is 3989983. The reversal of 3989971 is 1799893.

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

It is not a de Polignac number, because 3989971 - 2³ = 3989963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3989941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765 + ... + 2926.

It is an arithmetic number, because the mean of its divisors is an integer number (531648).

Almost surely, 2^3989971 is an apocalyptic number.

3989971 is a deficient number, since it is larger than the sum of its proper divisors (263213).

3989971 is a wasteful number, since it uses less digits than its factorization.

3989971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761.

The product of its digits is 122472, while the sum is 46.

The square root of 3989971 is about 1997.4911764511. The cubic root of 3989971 is about 158.6073271227.

The spelling of 3989971 in words is "three million, nine hundred eighty-nine thousand, nine hundred seventy-one".