9870649 has 4 divisors (see below), whose sum is σ = 9915136. Its totient is φ = 9826164.

The previous prime is 9870647. The next prime is 9870661. The reversal of 9870649 is 9460789.

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.

It is a cyclic number.

It is not a de Polignac number, because 9870649 - 2¹ = 9870647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9870647) 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, 21909 + ... + 22354.

It is an arithmetic number, because the mean of its divisors is an integer number (2478784).

Almost surely, 2^9870649 is an apocalyptic number.

It is an amenable number.

9870649 is a deficient number, since it is larger than the sum of its proper divisors (44487).

9870649 is a wasteful number, since it uses less digits than its factorization.

9870649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44486.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 9870649 is about 3141.7589022711. The cubic root of 9870649 is about 214.5105071077.

The spelling of 9870649 in words is "nine million, eight hundred seventy thousand, six hundred forty-nine".