9911949 has 8 divisors (see below), whose sum is σ = 13255200. Its totient is φ = 6588336.

The previous prime is 9911929. The next prime is 9911953. The reversal of 9911949 is 9491199.

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

It is not a de Polignac number, because 9911949 - 2⁵ = 9911917 is a prime.

It is a Curzon number.

9911949 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9911949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9911929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3687 + ... + 5780.

It is an arithmetic number, because the mean of its divisors is an integer number (1656900).

Almost surely, 2^9911949 is an apocalyptic number.

It is an amenable number.

9911949 is a deficient number, since it is larger than the sum of its proper divisors (3343251).

9911949 is a wasteful number, since it uses less digits than its factorization.

9911949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9819.

The product of its digits is 26244, while the sum is 42.

The square root of 9911949 is about 3148.3247926477. The cubic root of 9911949 is about 214.8092701873.

The spelling of 9911949 in words is "nine million, nine hundred eleven thousand, nine hundred forty-nine".