8383981 has 4 divisors (see below), whose sum is σ = 8654464. Its totient is φ = 8113500.

The previous prime is 8383961. The next prime is 8384003. The reversal of 8383981 is 1893838.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1893838 = 2 ⋅946919.

It is a cyclic number.

It is not a de Polignac number, because 8383981 - 2⁹ = 8383469 is a prime.

It is a super-2 number, since 2×8383981² = 140582274816722, 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 (8383961) 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 3 ways as a sum of consecutive naturals, for example, 135195 + ... + 135256.

It is an arithmetic number, because the mean of its divisors is an integer number (2163616).

Almost surely, 2^8383981 is an apocalyptic number.

It is an amenable number.

8383981 is a deficient number, since it is larger than the sum of its proper divisors (270483).

8383981 is a wasteful number, since it uses less digits than its factorization.

8383981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270482.

The product of its digits is 41472, while the sum is 40.

The square root of 8383981 is about 2895.5104903972. The cubic root of 8383981 is about 203.1499696641.

The spelling of 8383981 in words is "eight million, three hundred eighty-three thousand, nine hundred eighty-one".