8442972447 has 16 divisors (see below), whose sum is σ = 13855134720. Its totient is φ = 4453435872.

The previous prime is 8442972427. The next prime is 8442972469. The reversal of 8442972447 is 7442792448.

It is not a de Polignac number, because 8442972447 - 2⁶ = 8442972383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8442972447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8442972427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15463047 + ... + 15463592.

It is an arithmetic number, because the mean of its divisors is an integer number (865945920).

Almost surely, 2^8442972447 is an apocalyptic number.

8442972447 is a deficient number, since it is larger than the sum of its proper divisors (5412162273).

8442972447 is a wasteful number, since it uses less digits than its factorization.

8442972447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30926662.

The product of its digits is 3612672, while the sum is 51.

The square root of 8442972447 is about 91885.6487543077. The cubic root of 8442972447 is about 2036.2532508528.

The spelling of 8442972447 in words is "eight billion, four hundred forty-two million, nine hundred seventy-two thousand, four hundred forty-seven".