1191103 has 2 divisors, whose sum is σ = 1191104. Its totient is φ = 1191102.

The previous prime is 1191097. The next prime is 1191107. The reversal of 1191103 is 3011911.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1191103 - 2⁹ = 1190591 is a prime.

1191103 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1191107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595551 + 595552.

It is an arithmetic number, because the mean of its divisors is an integer number (595552).

2^1191103 is an apocalyptic number.

1191103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191103 is an equidigital number, since it uses as much as digits as its factorization.

1191103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 1191103 is about 1091.3766535894. The cubic root of 1191103 is about 106.0025809268.

The spelling of 1191103 in words is "one million, one hundred ninety-one thousand, one hundred three".