8982397981 has 4 divisors (see below), whose sum is σ = 9225165532. Its totient is φ = 8739630432.

The previous prime is 8982397973. The next prime is 8982397987. The reversal of 8982397981 is 1897932898.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5970034756 + 3012363225 = 77266^2 + 54885^2 .

It is a cyclic number.

It is not a de Polignac number, because 8982397981 - 2³ = 8982397973 is a prime.

It is a super-2 number, since 2×8982397981² (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 (8982397987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121383720 + ... + 121383793.

It is an arithmetic number, because the mean of its divisors is an integer number (2306291383).

Almost surely, 2^8982397981 is an apocalyptic number.

It is an amenable number.

8982397981 is a deficient number, since it is larger than the sum of its proper divisors (242767551).

8982397981 is a wasteful number, since it uses less digits than its factorization.

8982397981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242767550.

The product of its digits is 15676416, while the sum is 64.

The square root of 8982397981 is about 94775.5136150683. The cubic root of 8982397981 is about 2078.7268760010.

The spelling of 8982397981 in words is "eight billion, nine hundred eighty-two million, three hundred ninety-seven thousand, nine hundred eighty-one".