8947835649 has 9 divisors (see below), whose sum is σ = 12925061409. Its totient is φ = 5965034580.

The previous prime is 8947835647. The next prime is 8947835657. The reversal of 8947835649 is 9465387498.

The square root of 8947835649 is 94593.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 8947835649 - 2¹ = 8947835647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8947835647) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 268014 + ... + 299544.

Almost surely, 2^8947835649 is an apocalyptic number.

8947835649 is the 94593-rd square number.

8947835649 is the 47297-th centered octagonal number.

It is an amenable number.

8947835649 is a deficient number, since it is larger than the sum of its proper divisors (3977225760).

8947835649 is an frugal number, since it uses more digits than its factorization.

8947835649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63068 (or 31534 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The cubic root of 8947835649 is about 2076.0572846912.

The spelling of 8947835649 in words is "eight billion, nine hundred forty-seven million, eight hundred thirty-five thousand, six hundred forty-nine".