9998747 has 8 divisors (see below), whose sum is σ = 11161920. Its totient is φ = 8877960.

The previous prime is 9998743. The next prime is 9998749. The reversal of 9998747 is 7478999.

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 9998747 - 2² = 9998743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9998741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10097 + ... + 11042.

It is an arithmetic number, because the mean of its divisors is an integer number (1395240).

Almost surely, 2^9998747 is an apocalyptic number.

9998747 is a deficient number, since it is larger than the sum of its proper divisors (1163173).

9998747 is a wasteful number, since it uses less digits than its factorization.

9998747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21193.

The product of its digits is 1143072, while the sum is 53.

The square root of 9998747 is about 3162.0795372666. The cubic root of 9998747 is about 215.4344702718.

The spelling of 9998747 in words is "nine million, nine hundred ninety-eight thousand, seven hundred forty-seven".