8442904247 has 4 divisors (see below), whose sum is σ = 8509383936. Its totient is φ = 8376424560.

The previous prime is 8442904243. The next prime is 8442904303. The reversal of 8442904247 is 7424092448.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8442904247 - 2² = 8442904243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8442904198 and 8442904207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8442904243) 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, 33239654 + ... + 33239907.

It is an arithmetic number, because the mean of its divisors is an integer number (2127345984).

Almost surely, 2^8442904247 is an apocalyptic number.

8442904247 is a deficient number, since it is larger than the sum of its proper divisors (66479689).

8442904247 is a wasteful number, since it uses less digits than its factorization.

8442904247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66479688.

The product of its (nonzero) digits is 516096, while the sum is 44.

The square root of 8442904247 is about 91885.2776401095. The cubic root of 8442904247 is about 2036.2477680742.

The spelling of 8442904247 in words is "eight billion, four hundred forty-two million, nine hundred four thousand, two hundred forty-seven".