3984397 has 4 divisors (see below), whose sum is σ = 4121820. Its totient is φ = 3846976.

The previous prime is 3984391. The next prime is 3984403. The reversal of 3984397 is 7934893.

3984397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7934893 = 29 ⋅273617.

It is an interprime number because it is at equal distance from previous prime (3984391) and next prime (3984403).

It can be written as a sum of positive squares in 2 ways, for example, as 2996361 + 988036 = 1731^2 + 994^2 .

It is a cyclic number.

It is not a de Polignac number, because 3984397 - 2³ = 3984389 is a prime.

It is a d-powerful number, because it can be written as 3³ + 9³ + 8⁷ + 4³ + 3¹² + 9⁶ + 7⁷ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3984391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68668 + ... + 68725.

It is an arithmetic number, because the mean of its divisors is an integer number (1030455).

Almost surely, 2^3984397 is an apocalyptic number.

It is an amenable number.

3984397 is a deficient number, since it is larger than the sum of its proper divisors (137423).

3984397 is a wasteful number, since it uses less digits than its factorization.

3984397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137422.

The product of its digits is 163296, while the sum is 43.

The square root of 3984397 is about 1996.0954386001. The cubic root of 3984397 is about 158.5334344180.

The spelling of 3984397 in words is "three million, nine hundred eighty-four thousand, three hundred ninety-seven".