9991130 has 16 divisors (see below), whose sum is σ = 18213120. Its totient is φ = 3945552.

The previous prime is 9991127. The next prime is 9991133. The reversal of 9991130 is 311999.

It is an interprime number because it is at equal distance from previous prime (9991127) and next prime (9991133).

It is not an unprimeable number, because it can be changed into a prime (9991133) 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, 5534 + ... + 7113.

It is an arithmetic number, because the mean of its divisors is an integer number (1138320).

Almost surely, 2^9991130 is an apocalyptic number.

9991130 is a deficient number, since it is larger than the sum of its proper divisors (8221990).

9991130 is a wasteful number, since it uses less digits than its factorization.

9991130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12733.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 9991130 is about 3160.8748788903. The cubic root of 9991130 is about 215.3797507078.

The spelling of 9991130 in words is "nine million, nine hundred ninety-one thousand, one hundred thirty".