3978089 has 4 divisors (see below), whose sum is σ = 3982080. Its totient is φ = 3974100.

The previous prime is 3978071. The next prime is 3978101. The reversal of 3978089 is 9808793.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9808793 = 103 ⋅95231.

It is a cyclic number.

It is not a de Polignac number, because 3978089 - 2²⁰ = 2929513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3975089) 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, 932 + ... + 2970.

It is an arithmetic number, because the mean of its divisors is an integer number (995520).

Almost surely, 2^3978089 is an apocalyptic number.

It is an amenable number.

3978089 is a deficient number, since it is larger than the sum of its proper divisors (3991).

3978089 is a wasteful number, since it uses less digits than its factorization.

3978089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 3978089 is about 1994.5147279476. The cubic root of 3978089 is about 158.4497281416.

The spelling of 3978089 in words is "three million, nine hundred seventy-eight thousand, eighty-nine".