9859649 has 4 divisors (see below), whose sum is σ = 10126164. Its totient is φ = 9593136.

The previous prime is 9859637. The next prime is 9859669. The reversal of 9859649 is 9469589.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8809024 + 1050625 = 2968^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 9859649 - 2¹² = 9855553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9859597 and 9859606.

It is not an unprimeable number, because it can be changed into a prime (9859669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133202 + ... + 133275.

It is an arithmetic number, because the mean of its divisors is an integer number (2531541).

Almost surely, 2^9859649 is an apocalyptic number.

It is an amenable number.

9859649 is a deficient number, since it is larger than the sum of its proper divisors (266515).

9859649 is a wasteful number, since it uses less digits than its factorization.

9859649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266514.

The product of its digits is 699840, while the sum is 50.

The square root of 9859649 is about 3140.0078025381. The cubic root of 9859649 is about 214.4307929082.

It can be divided in two parts, 98596 and 49, that multiplied together give a square (4831204 = 2198²).

The spelling of 9859649 in words is "nine million, eight hundred fifty-nine thousand, six hundred forty-nine".