9978611449 has 9 divisors (see below), whose sum is σ = 10050345669. Its totient is φ = 9907387740.

The previous prime is 9978611443. The next prime is 9978611453. The reversal of 9978611449 is 9441168799.

The square root of 9978611449 is 99893.

It is a perfect power (a square), and thus also a powerful number.

9978611449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9978611449 - 2⁵ = 9978611417 is a prime.

It is a super-2 number, since 2×9978611449² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9978611393 and 9978611402.

It is not an unprimeable number, because it can be changed into a prime (9978611443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19079302 + ... + 19079824.

Almost surely, 2^9978611449 is an apocalyptic number.

9978611449 is the 99893-rd square number.

9978611449 is the 49947-th centered octagonal number.

It is an amenable number.

9978611449 is a deficient number, since it is larger than the sum of its proper divisors (71734220).

9978611449 is an frugal number, since it uses more digits than its factorization.

9978611449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428 (or 714 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 58.

The cubic root of 9978611449 is about 2152.8975857545.

The spelling of 9978611449 in words is "nine billion, nine hundred seventy-eight million, six hundred eleven thousand, four hundred forty-nine".