8779981 has 8 divisors (see below), whose sum is σ = 10161920. Its totient is φ = 7429968.

The previous prime is 8779961. The next prime is 8779993. The reversal of 8779981 is 1899778.

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

It is not a de Polignac number, because 8779981 - 2⁷ = 8779853 is a prime.

It is a super-2 number, since 2×8779981² = 154176132720722, 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 (8779961) 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, 7386 + ... + 8491.

It is an arithmetic number, because the mean of its divisors is an integer number (1270240).

Almost surely, 2^8779981 is an apocalyptic number.

It is an amenable number.

8779981 is a deficient number, since it is larger than the sum of its proper divisors (1381939).

8779981 is a wasteful number, since it uses less digits than its factorization.

8779981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15963.

The product of its digits is 254016, while the sum is 49.

The square root of 8779981 is about 2963.1032719094. The cubic root of 8779981 is about 206.2993495624.

The spelling of 8779981 in words is "eight million, seven hundred seventy-nine thousand, nine hundred eighty-one".