9869031649 has 9 divisors (see below), whose sum is σ = 10119787219. Its totient is φ = 9624349840.

The previous prime is 9869031637. The next prime is 9869031749. The reversal of 9869031649 is 9461309689.

The square root of 9869031649 is 99343.

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

9869031649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 475545249 + 9393486400 = 21807^2 + 96920^2 .

It is not a de Polignac number, because 9869031649 - 2¹⁷ = 9868900577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9869031649.

It is not an unprimeable number, because it can be changed into a prime (9869031749) 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, 4071852 + ... + 4074274.

Almost surely, 2^9869031649 is an apocalyptic number.

9869031649 is the 99343-rd square number.

9869031649 is the 49672-nd centered octagonal number.

It is an amenable number.

9869031649 is a deficient number, since it is larger than the sum of its proper divisors (250755570).

9869031649 is an frugal number, since it uses more digits than its factorization.

9869031649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4928 (or 2464 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 55.

The cubic root of 9869031649 is about 2144.9879029172.

The spelling of 9869031649 in words is "nine billion, eight hundred sixty-nine million, thirty-one thousand, six hundred forty-nine".