3978069 has 8 divisors (see below), whose sum is σ = 5343360. Its totient is φ = 2632416.

The previous prime is 3978053. The next prime is 3978071. The reversal of 3978069 is 9608793.

It is a happy number.

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

It is not a de Polignac number, because 3978069 - 2⁴ = 3978053 is a prime.

It is a super-2 number, since 2×3978069² = 31650065937522, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3978069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978269) 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, 4429 + ... + 5250.

It is an arithmetic number, because the mean of its divisors is an integer number (667920).

Almost surely, 2^3978069 is an apocalyptic number.

It is an amenable number.

3978069 is a deficient number, since it is larger than the sum of its proper divisors (1365291).

3978069 is a wasteful number, since it uses less digits than its factorization.

3978069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9819.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 3978069 is about 1994.5097141904. The cubic root of 3978069 is about 158.4494626037.

The spelling of 3978069 in words is "three million, nine hundred seventy-eight thousand, sixty-nine".