8917642047 has 8 divisors (see below), whose sum is σ = 12005628544. Its totient is φ = 5887375128.

The previous prime is 8917642037. The next prime is 8917642079. The reversal of 8917642047 is 7402467198.

8917642047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 8917642047 - 2⁴ = 8917642031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8917641987 and 8917642005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8917642037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14429533 + ... + 14430150.

It is an arithmetic number, because the mean of its divisors is an integer number (1500703568).

Almost surely, 2^8917642047 is an apocalyptic number.

8917642047 is a deficient number, since it is larger than the sum of its proper divisors (3087986497).

8917642047 is a wasteful number, since it uses less digits than its factorization.

8917642047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28859789.

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 8917642047 is about 94433.2676920586. The cubic root of 8917642047 is about 2073.7195019787.

The spelling of 8917642047 in words is "eight billion, nine hundred seventeen million, six hundred forty-two thousand, forty-seven".