9991846 has 4 divisors (see below), whose sum is σ = 14987772. Its totient is φ = 4995922.

The previous prime is 9991837. The next prime is 9991847. The reversal of 9991846 is 6481999.

9991846 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 9991796 and 9991805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9991847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2497960 + ... + 2497963.

It is an arithmetic number, because the mean of its divisors is an integer number (3746943).

Almost surely, 2^9991846 is an apocalyptic number.

9991846 is a deficient number, since it is larger than the sum of its proper divisors (4995926).

9991846 is a wasteful number, since it uses less digits than its factorization.

9991846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4995925.

The product of its digits is 139968, while the sum is 46.

The square root of 9991846 is about 3160.9881366434. The cubic root of 9991846 is about 215.3848955452.

The spelling of 9991846 in words is "nine million, nine hundred ninety-one thousand, eight hundred forty-six".