9972447 has 8 divisors (see below), whose sum is σ = 13484160. Its totient is φ = 6554520.

The previous prime is 9972439. The next prime is 9972449. The reversal of 9972447 is 7442799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9972447 - 2³ = 9972439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9972399 and 9972408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9972449) 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 7 ways as a sum of consecutive naturals, for example, 23197 + ... + 23622.

It is an arithmetic number, because the mean of its divisors is an integer number (1685520).

Almost surely, 2^9972447 is an apocalyptic number.

9972447 is a deficient number, since it is larger than the sum of its proper divisors (3511713).

9972447 is a wasteful number, since it uses less digits than its factorization.

9972447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46893.

The product of its digits is 127008, while the sum is 42.

The square root of 9972447 is about 3157.9181433343. The cubic root of 9972447 is about 215.2454165303.

The spelling of 9972447 in words is "nine million, nine hundred seventy-two thousand, four hundred forty-seven".