9871972 has 12 divisors (see below), whose sum is σ = 18846576. Its totient is φ = 4487240.

The previous prime is 9871957. The next prime is 9871973. The reversal of 9871972 is 2791789.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9871973) 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, 112138 + ... + 112225.

It is an arithmetic number, because the mean of its divisors is an integer number (1570548).

Almost surely, 2^9871972 is an apocalyptic number.

It is an amenable number.

9871972 is a deficient number, since it is larger than the sum of its proper divisors (8974604).

9871972 is a wasteful number, since it uses less digits than its factorization.

9871972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224378 (or 224376 counting only the distinct ones).

The product of its digits is 63504, while the sum is 43.

The square root of 9871972 is about 3141.9694460640. The cubic root of 9871972 is about 214.5200905614.

The spelling of 9871972 in words is "nine million, eight hundred seventy-one thousand, nine hundred seventy-two".