9872071 has 4 divisors (see below), whose sum is σ = 10769544. Its totient is φ = 8974600.

The previous prime is 9872063. The next prime is 9872089. The reversal of 9872071 is 1702789.

9872071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1702789 = 11 ⋅154799.

It is a cyclic number.

It is not a de Polignac number, because 9872071 - 2³ = 9872063 is a prime.

It is a Duffinian number.

9872071 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9872011) 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, 448720 + ... + 448741.

It is an arithmetic number, because the mean of its divisors is an integer number (2692386).

Almost surely, 2^9872071 is an apocalyptic number.

9872071 is a deficient number, since it is larger than the sum of its proper divisors (897473).

9872071 is a wasteful number, since it uses less digits than its factorization.

9872071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897472.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 9872071 is about 3141.9852004744. The cubic root of 9872071 is about 214.5208076561.

The spelling of 9872071 in words is "nine million, eight hundred seventy-two thousand, seventy-one".