8442621247 has 16 divisors (see below), whose sum is σ = 9162413568. Its totient is φ = 7758384480.

The previous prime is 8442621223. The next prime is 8442621263. The reversal of 8442621247 is 7421262448.

It is a cyclic number.

It is not a de Polignac number, because 8442621247 - 2⁷ = 8442621119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8442621287) 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, 9643 + ... + 130300.

It is an arithmetic number, because the mean of its divisors is an integer number (572650848).

Almost surely, 2^8442621247 is an apocalyptic number.

8442621247 is a deficient number, since it is larger than the sum of its proper divisors (719792321).

8442621247 is a wasteful number, since it uses less digits than its factorization.

8442621247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140070.

The product of its digits is 172032, while the sum is 40.

The square root of 8442621247 is about 91883.7376634190. The cubic root of 8442621247 is about 2036.2250166394.

The spelling of 8442621247 in words is "eight billion, four hundred forty-two million, six hundred twenty-one thousand, two hundred forty-seven".