9649889 has 4 divisors (see below), whose sum is σ = 9666756. Its totient is φ = 9633024.

The previous prime is 9649877. The next prime is 9649901. The reversal of 9649889 is 9889469.

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

It is an interprime number because it is at equal distance from previous prime (9649877) and next prime (9649901).

It can be written as a sum of positive squares in 2 ways, for example, as 7980625 + 1669264 = 2825^2 + 1292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9649889 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 9649889.

It is not an unprimeable number, because it can be changed into a prime (9649819) 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, 7544 + ... + 8729.

It is an arithmetic number, because the mean of its divisors is an integer number (2416689).

Almost surely, 2^9649889 is an apocalyptic number.

It is an amenable number.

9649889 is a deficient number, since it is larger than the sum of its proper divisors (16867).

9649889 is a wasteful number, since it uses less digits than its factorization.

9649889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16866.

The product of its digits is 1119744, while the sum is 53.

The square root of 9649889 is about 3106.4270472683. The cubic root of 9649889 is about 212.8992374617.

The spelling of 9649889 in words is "nine million, six hundred forty-nine thousand, eight hundred eighty-nine".