8978939 has 4 divisors (see below), whose sum is σ = 9025656. Its totient is φ = 8932224.

The previous prime is 8978923. The next prime is 8978953. The reversal of 8978939 is 9398798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9398798 = 2 ⋅4699399.

It is a cyclic number.

It is not a de Polignac number, because 8978939 - 2⁴ = 8978923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8978909) 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, 23069 + ... + 23454.

It is an arithmetic number, because the mean of its divisors is an integer number (2256414).

Almost surely, 2^8978939 is an apocalyptic number.

8978939 is a deficient number, since it is larger than the sum of its proper divisors (46717).

8978939 is a wasteful number, since it uses less digits than its factorization.

8978939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46716.

The product of its digits is 979776, while the sum is 53.

The square root of 8978939 is about 2996.4877773820. The cubic root of 8978939 is about 207.8460013339.

The spelling of 8978939 in words is "eight million, nine hundred seventy-eight thousand, nine hundred thirty-nine".