9991485 has 64 divisors (see below), whose sum is σ = 20697600. Its totient is φ = 4478976.

The previous prime is 9991469. The next prime is 9991489. The reversal of 9991485 is 5841999.

It is not a de Polignac number, because 9991485 - 2⁴ = 9991469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

9991485 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9991485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9991489) 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 63 ways as a sum of consecutive naturals, for example, 91611 + ... + 91719.

It is an arithmetic number, because the mean of its divisors is an integer number (323400).

Almost surely, 2^9991485 is an apocalyptic number.

It is an amenable number.

9991485 is an abundant number, since it is smaller than the sum of its proper divisors (10706115).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9991485 is a wasteful number, since it uses less digits than its factorization.

9991485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 221 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 9991485 is about 3160.9310337304. The cubic root of 9991485 is about 215.3823016006.

It can be divided in two parts, 99914 and 85, that added together give a palindrome (99999).

The spelling of 9991485 in words is "nine million, nine hundred ninety-one thousand, four hundred eighty-five".