8118981 has 16 divisors (see below), whose sum is σ = 12953920. Its totient is φ = 4996080.

The previous prime is 8118973. The next prime is 8118991. The reversal of 8118981 is 1898118.

It is not a de Polignac number, because 8118981 - 2³ = 8118973 is a prime.

It is a super-2 number, since 2×8118981² = 131835704956722, 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 (8118991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11215 + ... + 11916.

It is an arithmetic number, because the mean of its divisors is an integer number (809620).

Almost surely, 2^8118981 is an apocalyptic number.

It is an amenable number.

8118981 is a deficient number, since it is larger than the sum of its proper divisors (4834939).

8118981 is a wasteful number, since it uses less digits than its factorization.

8118981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23153 (or 23147 counting only the distinct ones).

The product of its digits is 4608, while the sum is 36.

The square root of 8118981 is about 2849.3825646971. The cubic root of 8118981 is about 200.9866331053.

The spelling of 8118981 in words is "eight million, one hundred eighteen thousand, nine hundred eighty-one".