3994197 has 4 divisors (see below), whose sum is σ = 5325600. Its totient is φ = 2662796.

The previous prime is 3994189. The next prime is 3994213. The reversal of 3994197 is 7914993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7914993 = 3 ⋅2638331.

It is a cyclic number.

It is not a de Polignac number, because 3994197 - 2³ = 3994189 is a prime.

It is a D-number.

It is a plaindrome in base 11.

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994147) 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 3 ways as a sum of consecutive naturals, for example, 665697 + ... + 665702.

It is an arithmetic number, because the mean of its divisors is an integer number (1331400).

Almost surely, 2^3994197 is an apocalyptic number.

It is an amenable number.

3994197 is a deficient number, since it is larger than the sum of its proper divisors (1331403).

3994197 is a wasteful number, since it uses less digits than its factorization.

3994197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331402.

The product of its digits is 61236, while the sum is 42.

The square root of 3994197 is about 1998.5487234491. The cubic root of 3994197 is about 158.6633039758.

The spelling of 3994197 in words is "three million, nine hundred ninety-four thousand, one hundred ninety-seven".