9991934 has 8 divisors (see below), whose sum is σ = 15005928. Its totient is φ = 4989960.

The previous prime is 9991879. The next prime is 9991939. The reversal of 9991934 is 4391999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9991939) 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, 512 + ... + 4499.

It is an arithmetic number, because the mean of its divisors is an integer number (1875741).

Almost surely, 2^9991934 is an apocalyptic number.

9991934 is a deficient number, since it is larger than the sum of its proper divisors (5013994).

9991934 is a wasteful number, since it uses less digits than its factorization.

9991934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010.

The product of its digits is 78732, while the sum is 44.

The square root of 9991934 is about 3161.0020563106. The cubic root of 9991934 is about 215.3855278546.

The spelling of 9991934 in words is "nine million, nine hundred ninety-one thousand, nine hundred thirty-four".