991411 has 4 divisors (see below), whose sum is σ = 1023424. Its totient is φ = 959400.

The previous prime is 991409. The next prime is 991427. The reversal of 991411 is 114199.

991411 is nontrivially palindromic in base 8.

991411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 991411 - 2¹ = 991409 is a prime.

It is a Duffinian number.

991411 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (991511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15960 + ... + 16021.

It is an arithmetic number, because the mean of its divisors is an integer number (255856).

2⁹⁹¹⁴¹¹ is an apocalyptic number.

991411 is a deficient number, since it is larger than the sum of its proper divisors (32013).

991411 is a wasteful number, since it uses less digits than its factorization.

991411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32012.

The product of its digits is 324, while the sum is 25.

The square root of 991411 is about 995.6962388199. The cubic root of 991411 is about 99.7128763893.

The spelling of 991411 in words is "nine hundred ninety-one thousand, four hundred eleven".