9870949 has 4 divisors (see below), whose sum is σ = 10768320. Its totient is φ = 8973580.

The previous prime is 9870947. The next prime is 9870953. The reversal of 9870949 is 9490789.

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 not a de Polignac number, because 9870949 - 2¹ = 9870947 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9870899 and 9870908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9870943) 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, 448669 + ... + 448690.

It is an arithmetic number, because the mean of its divisors is an integer number (2692080).

Almost surely, 2^9870949 is an apocalyptic number.

It is an amenable number.

9870949 is a deficient number, since it is larger than the sum of its proper divisors (897371).

9870949 is a wasteful number, since it uses less digits than its factorization.

9870949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897370.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 9870949 is about 3141.8066458648. The cubic root of 9870949 is about 214.5126803015.

The spelling of 9870949 in words is "nine million, eight hundred seventy thousand, nine hundred forty-nine".