9947813 has 8 divisors (see below), whose sum is σ = 10197600. Its totient is φ = 9700848.

The previous prime is 9947803. The next prime is 9947837. The reversal of 9947813 is 3187499.

It is a happy number.

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 9947813 - 2¹⁰ = 9946789 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 (9947803) 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 7 ways as a sum of consecutive naturals, for example, 7595 + ... + 8807.

It is an arithmetic number, because the mean of its divisors is an integer number (1274700).

Almost surely, 2^9947813 is an apocalyptic number.

It is an amenable number.

9947813 is a deficient number, since it is larger than the sum of its proper divisors (249787).

9947813 is a wasteful number, since it uses less digits than its factorization.

9947813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411.

The product of its digits is 54432, while the sum is 41.

The square root of 9947813 is about 3154.0153772612. The cubic root of 9947813 is about 215.0680368774.

The spelling of 9947813 in words is "nine million, nine hundred forty-seven thousand, eight hundred thirteen".