8978981 has 4 divisors (see below), whose sum is σ = 9795264. Its totient is φ = 8162700.

The previous prime is 8978971. The next prime is 8978989. The reversal of 8978981 is 1898798.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 8978981 - 2¹⁰ = 8977957 is a prime.

It is a super-2 number, since 2×8978981² = 161244199596722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8978989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408125 + ... + 408146.

It is an arithmetic number, because the mean of its divisors is an integer number (2448816).

Almost surely, 2^8978981 is an apocalyptic number.

It is an amenable number.

8978981 is a deficient number, since it is larger than the sum of its proper divisors (816283).

8978981 is a wasteful number, since it uses less digits than its factorization.

8978981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816282.

The product of its digits is 290304, while the sum is 50.

The square root of 8978981 is about 2996.4947855786. The cubic root of 8978981 is about 207.8463254077.

The spelling of 8978981 in words is "eight million, nine hundred seventy-eight thousand, nine hundred eighty-one".