9979449481 has 4 divisors (see below), whose sum is σ = 10072715472. Its totient is φ = 9886183492.

The previous prime is 9979449443. The next prime is 9979449509. The reversal of 9979449481 is 1849449799.

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: 1849449799 = 29 ⋅63774131.

It is a cyclic number.

It is not a de Polignac number, because 9979449481 - 2⁷ = 9979449353 is a prime.

It is a super-2 number, since 2×9979449481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9979449281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46632835 + ... + 46633048.

It is an arithmetic number, because the mean of its divisors is an integer number (2518178868).

Almost surely, 2^9979449481 is an apocalyptic number.

It is an amenable number.

9979449481 is a deficient number, since it is larger than the sum of its proper divisors (93265991).

9979449481 is a wasteful number, since it uses less digits than its factorization.

9979449481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93265990.

The product of its digits is 23514624, while the sum is 64.

The square root of 9979449481 is about 99897.1945602077. The cubic root of 9979449481 is about 2152.9578528760.

The spelling of 9979449481 in words is "nine billion, nine hundred seventy-nine million, four hundred forty-nine thousand, four hundred eighty-one".