9870447 has 4 divisors (see below), whose sum is σ = 13160600. Its totient is φ = 6580296.

The previous prime is 9870409. The next prime is 9870449. The reversal of 9870447 is 7440789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7440789 = 3 ⋅2480263.

It is not a de Polignac number, because 9870447 - 2¹⁶ = 9804911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9870449) 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, 1645072 + ... + 1645077.

It is an arithmetic number, because the mean of its divisors is an integer number (3290150).

Almost surely, 2^9870447 is an apocalyptic number.

9870447 is a deficient number, since it is larger than the sum of its proper divisors (3290153).

9870447 is a wasteful number, since it uses less digits than its factorization.

9870447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290152.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 9870447 is about 3141.7267545094. The cubic root of 9870447 is about 214.5090437991.

The spelling of 9870447 in words is "nine million, eight hundred seventy thousand, four hundred forty-seven".