9991411 has 4 divisors (see below), whose sum is σ = 10052872. Its totient is φ = 9929952.

The previous prime is 9991409. The next prime is 9991433. The reversal of 9991411 is 1141999.

9991411 = T₆₆ + T₆₇ + ... + T₃₉₁.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9991411 - 2¹ = 9991409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9991441) 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 3 ways as a sum of consecutive naturals, for example, 30486 + ... + 30811.

It is an arithmetic number, because the mean of its divisors is an integer number (2513218).

Almost surely, 2^9991411 is an apocalyptic number.

9991411 is a deficient number, since it is larger than the sum of its proper divisors (61461).

9991411 is a wasteful number, since it uses less digits than its factorization.

9991411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61460.

The product of its digits is 2916, while the sum is 34.

The square root of 9991411 is about 3160.9193282968. The cubic root of 9991411 is about 215.3817698702.

The spelling of 9991411 in words is "nine million, nine hundred ninety-one thousand, four hundred eleven".