9941991499 has 12 divisors (see below), whose sum is σ = 10930544352. Its totient is φ = 9036048560.

The previous prime is 9941991491. The next prime is 9941991539.

9941991499 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9941991499 - 2³ = 9941991491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9941991499.

It is not an unprimeable number, because it can be changed into a prime (9941991491) 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 11 ways as a sum of consecutive naturals, for example, 757854 + ... + 770860.

It is an arithmetic number, because the mean of its divisors is an integer number (910878696).

Almost surely, 2^9941991499 is an apocalyptic number.

9941991499 is a deficient number, since it is larger than the sum of its proper divisors (988552853).

9941991499 is a wasteful number, since it uses less digits than its factorization.

9941991499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19346 (or 19335 counting only the distinct ones).

The product of its digits is 8503056, while the sum is 64.

The square root of 9941991499 is about 99709.5356472991. The cubic root of 9941991499 is about 2150.2607579172.

The spelling of 9941991499 in words is "nine billion, nine hundred forty-one million, nine hundred ninety-one thousand, four hundred ninety-nine".