9981079 has 2 divisors, whose sum is σ = 9981080. Its totient is φ = 9981078.

The previous prime is 9981073. The next prime is 9981121. The reversal of 9981079 is 9701899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9981079 - 2¹⁵ = 9948311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9981073) 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 as a sum of consecutive naturals, namely, 4990539 + 4990540.

It is an arithmetic number, because the mean of its divisors is an integer number (4990540).

Almost surely, 2^9981079 is an apocalyptic number.

9981079 is a deficient number, since it is larger than the sum of its proper divisors (1).

9981079 is an equidigital number, since it uses as much as digits as its factorization.

9981079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 9981079 is about 3159.2845709116. The cubic root of 9981079 is about 215.3075030175.

The spelling of 9981079 in words is "nine million, nine hundred eighty-one thousand, seventy-nine".