9991874 has 8 divisors (see below), whose sum is σ = 15128208. Its totient is φ = 4949140.

The previous prime is 9991847. The next prime is 9991879. The reversal of 9991874 is 4781999.

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

It is not an unprimeable number, because it can be changed into a prime (9991879) 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 3 ways as a sum of consecutive naturals, for example, 23132 + ... + 23559.

It is an arithmetic number, because the mean of its divisors is an integer number (1891026).

Almost surely, 2^9991874 is an apocalyptic number.

9991874 is a deficient number, since it is larger than the sum of its proper divisors (5136334).

9991874 is a wasteful number, since it uses less digits than its factorization.

9991874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46800.

The product of its digits is 163296, while the sum is 47.

The square root of 9991874 is about 3160.9925656350. The cubic root of 9991874 is about 215.3850967349.

Adding to 9991874 its sum of digits (47), we get a square (9991921 = 3161²).

The spelling of 9991874 in words is "nine million, nine hundred ninety-one thousand, eight hundred seventy-four".