9894947 has 4 divisors (see below), whose sum is σ = 10162416. Its totient is φ = 9627480.

The previous prime is 9894923. The next prime is 9894967. The reversal of 9894947 is 7494989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7494989 = 829 ⋅9041.

It is a cyclic number.

It is not a de Polignac number, because 9894947 - 2⁶ = 9894883 is a prime.

It is a super-2 number, since 2×9894947² = 195819952265618, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9894895 and 9894904.

It is not an unprimeable number, because it can be changed into a prime (9894967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133679 + ... + 133752.

It is an arithmetic number, because the mean of its divisors is an integer number (2540604).

Almost surely, 2^9894947 is an apocalyptic number.

9894947 is a deficient number, since it is larger than the sum of its proper divisors (267469).

9894947 is a wasteful number, since it uses less digits than its factorization.

9894947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267468.

The product of its digits is 653184, while the sum is 50.

The square root of 9894947 is about 3145.6234676134. The cubic root of 9894947 is about 214.6863788700.

The spelling of 9894947 in words is "nine million, eight hundred ninety-four thousand, nine hundred forty-seven".