8017981 has 8 divisors (see below), whose sum is σ = 8467200. Its totient is φ = 7571520.

The previous prime is 8017979. The next prime is 8017987. The reversal of 8017981 is 1897108.

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

It is a cyclic number.

It is not a de Polignac number, because 8017981 - 2¹ = 8017979 is a prime.

It is a super-2 number, since 2×8017981² = 128576038632722, 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 (8017987) 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, 8661 + ... + 9541.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^8017981 is an apocalyptic number.

It is an amenable number.

8017981 is a deficient number, since it is larger than the sum of its proper divisors (449219).

8017981 is a wasteful number, since it uses less digits than its factorization.

8017981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 8017981 is about 2831.6039624213. The cubic root of 8017981 is about 200.1497295440.

It can be divided in two parts, 8017 and 981, that added together give a palindrome (8998).

The spelling of 8017981 in words is "eight million, seventeen thousand, nine hundred eighty-one".