9980091 has 40 divisors (see below), whose sum is σ = 17005824. Its totient is φ = 5773680.

The previous prime is 9980083. The next prime is 9980099. The reversal of 9980091 is 1900899.

It is an interprime number because it is at equal distance from previous prime (9980083) and next prime (9980099).

It is not a de Polignac number, because 9980091 - 2³ = 9980083 is a prime.

9980091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9980099) 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 39 ways as a sum of consecutive naturals, for example, 20250 + ... + 20736.

Almost surely, 2^9980091 is an apocalyptic number.

9980091 is a deficient number, since it is larger than the sum of its proper divisors (7025733).

9980091 is a wasteful number, since it uses less digits than its factorization.

9980091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 524 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 9980091 is about 3159.1282025268. The cubic root of 9980091 is about 215.3003985473.

It can be divided in two parts, 9 and 980091, that added together give a square (980100 = 990²).

The spelling of 9980091 in words is "nine million, nine hundred eighty thousand, ninety-one".