916191 has 10 divisors (see below), whose sum is σ = 1368752. Its totient is φ = 610740.

The previous prime is 916189. The next prime is 916213. The reversal of 916191 is 191619.

It is not a de Polignac number, because 916191 - 2¹ = 916189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

916191 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 916191.

It is not an unprimeable number, because it can be changed into a prime (916121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5575 + ... + 5736.

2⁹¹⁶¹⁹¹ is an apocalyptic number.

916191 is a deficient number, since it is larger than the sum of its proper divisors (452561).

916191 is a wasteful number, since it uses less digits than its factorization.

916191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11323 (or 11314 counting only the distinct ones).

The product of its digits is 486, while the sum is 27.

The square root of 916191 is about 957.1786667075. The cubic root of 916191 is about 97.1244726496.

916191 divided by its sum of digits (27) gives a palindrome (33933).

The spelling of 916191 in words is "nine hundred sixteen thousand, one hundred ninety-one".