3978697 has 8 divisors (see below), whose sum is σ = 4232736. Its totient is φ = 3726912.

The previous prime is 3978683. The next prime is 3978707. The reversal of 3978697 is 7968793.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3978697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3978697.

It is not an unprimeable number, because it can be changed into a prime (3978197) 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, 4398 + ... + 5224.

It is an arithmetic number, because the mean of its divisors is an integer number (529092).

Almost surely, 2^3978697 is an apocalyptic number.

It is an amenable number.

3978697 is a deficient number, since it is larger than the sum of its proper divisors (254039).

3978697 is a wasteful number, since it uses less digits than its factorization.

3978697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127.

The product of its digits is 571536, while the sum is 49.

The square root of 3978697 is about 1994.6671401515. The cubic root of 3978697 is about 158.4578000682.

The spelling of 3978697 in words is "three million, nine hundred seventy-eight thousand, six hundred ninety-seven".