8947646399 has 8 divisors (see below), whose sum is σ = 9265689360. Its totient is φ = 8630237056.

The previous prime is 8947646339. The next prime is 8947646437. The reversal of 8947646399 is 9936467498.

It is a happy number.

8947646399 is digitally balanced in base 3, 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 a cyclic number.

It is not a de Polignac number, because 8947646399 - 2⁸ = 8947646143 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 (8947646339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129569 + ... + 186234.

It is an arithmetic number, because the mean of its divisors is an integer number (1158211170).

Almost surely, 2^8947646399 is an apocalyptic number.

8947646399 is a deficient number, since it is larger than the sum of its proper divisors (318042961).

8947646399 is a wasteful number, since it uses less digits than its factorization.

8947646399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316809.

The product of its digits is 70543872, while the sum is 65.

The square root of 8947646399 is about 94591.9996564191. Note that the first 3 decimals coincide. The cubic root of 8947646399 is about 2076.0426481308.

Adding to 8947646399 its sum of digits (65), we get a square (8947646464 = 94592²).

The spelling of 8947646399 in words is "eight billion, nine hundred forty-seven million, six hundred forty-six thousand, three hundred ninety-nine".