9421586981 has 16 divisors (see below), whose sum is σ = 9981027840. Its totient is φ = 8868651120.

The previous prime is 9421586971. The next prime is 9421586989. The reversal of 9421586981 is 1896851249.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9421586981 is a prime.

It is a super-2 number, since 2×9421586981² (a number of 21 digits) 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 (9421586989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2977106 + ... + 2980268.

It is an arithmetic number, because the mean of its divisors is an integer number (623814240).

Almost surely, 2^9421586981 is an apocalyptic number.

It is an amenable number.

9421586981 is a deficient number, since it is larger than the sum of its proper divisors (559440859).

9421586981 is a wasteful number, since it uses less digits than its factorization.

9421586981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4136.

The product of its digits is 1244160, while the sum is 53.

The square root of 9421586981 is about 97064.8596609504. The cubic root of 9421586981 is about 2112.0686032302.

The spelling of 9421586981 in words is "nine billion, four hundred twenty-one million, five hundred eighty-six thousand, nine hundred eighty-one".