1108691 has 2 divisors, whose sum is σ = 1108692. Its totient is φ = 1108690.

The previous prime is 1108663. The next prime is 1108693. The reversal of 1108691 is 1968011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1108691 - 2¹⁴ = 1092307 is a prime.

Together with 1108693, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1108691.

It is not a weakly prime, because it can be changed into another prime (1108693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554345 + 554346.

It is an arithmetic number, because the mean of its divisors is an integer number (554346).

2^1108691 is an apocalyptic number.

1108691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1108691 is an equidigital number, since it uses as much as digits as its factorization.

1108691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1108691 is about 1052.9439681199. The cubic root of 1108691 is about 103.4991637232.

The spelling of 1108691 in words is "one million, one hundred eight thousand, six hundred ninety-one".