9894749 has 4 divisors (see below), whose sum is σ = 10057020. Its totient is φ = 9732480.

The previous prime is 9894743. The next prime is 9894751. The reversal of 9894749 is 9474989.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4687225 + 5207524 = 2165^2 + 2282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9894749 is a prime.

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 = 9894697 and 9894706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9894743) 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, 81044 + ... + 81165.

It is an arithmetic number, because the mean of its divisors is an integer number (2514255).

Almost surely, 2^9894749 is an apocalyptic number.

It is an amenable number.

9894749 is a deficient number, since it is larger than the sum of its proper divisors (162271).

9894749 is a wasteful number, since it uses less digits than its factorization.

9894749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162270.

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

The square root of 9894749 is about 3145.5919951577. The cubic root of 9894749 is about 214.6849468871.

The spelling of 9894749 in words is "nine million, eight hundred ninety-four thousand, seven hundred forty-nine".