8385981 has 8 divisors (see below), whose sum is σ = 11839104. Its totient is φ = 5261760.

The previous prime is 8385931. The next prime is 8385983. The reversal of 8385981 is 1895838.

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

It is not a de Polignac number, because 8385981 - 2⁶ = 8385917 is a prime.

It is a super-2 number, since 2×8385981² = 140649354664722, which contains 22 as substring.

8385981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8385983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82165 + ... + 82266.

It is an arithmetic number, because the mean of its divisors is an integer number (1479888).

Almost surely, 2^8385981 is an apocalyptic number.

8385981 is the 1832-nd centered pentagonal number.

It is an amenable number.

8385981 is a deficient number, since it is larger than the sum of its proper divisors (3453123).

8385981 is a wasteful number, since it uses less digits than its factorization.

8385981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164451.

The product of its digits is 69120, while the sum is 42.

The square root of 8385981 is about 2895.8558320469. The cubic root of 8385981 is about 203.1661221990.

The spelling of 8385981 in words is "eight million, three hundred eighty-five thousand, nine hundred eighty-one".