3989917 has 16 divisors (see below), whose sum is σ = 4465152. Its totient is φ = 3548160.

The previous prime is 3989903. The next prime is 3989929. The reversal of 3989917 is 7199893.

It is a cyclic number.

It is not a de Polignac number, because 3989917 - 2¹⁹ = 3465629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989957) 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 15 ways as a sum of consecutive naturals, for example, 35253 + ... + 35365.

It is an arithmetic number, because the mean of its divisors is an integer number (279072).

Almost surely, 2^3989917 is an apocalyptic number.

It is an amenable number.

3989917 is a deficient number, since it is larger than the sum of its proper divisors (475235).

3989917 is a wasteful number, since it uses less digits than its factorization.

3989917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228.

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

The square root of 3989917 is about 1997.4776594495. The cubic root of 3989917 is about 158.6066115925.

The spelling of 3989917 in words is "three million, nine hundred eighty-nine thousand, nine hundred seventeen".