1191323 has 4 divisors (see below), whose sum is σ = 1361520. Its totient is φ = 1021128.

The previous prime is 1191313. The next prime is 1191341. The reversal of 1191323 is 3231911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3231911 = 191 ⋅16921.

It is a cyclic number.

It is not a de Polignac number, because 1191323 - 2¹² = 1187227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1191295 and 1191304.

It is not an unprimeable number, because it can be changed into a prime (1191313) 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 in 3 ways as a sum of consecutive naturals, for example, 85088 + ... + 85101.

It is an arithmetic number, because the mean of its divisors is an integer number (340380).

2^1191323 is an apocalyptic number.

1191323 is a deficient number, since it is larger than the sum of its proper divisors (170197).

1191323 is an equidigital number, since it uses as much as digits as its factorization.

1191323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170196.

The product of its digits is 162, while the sum is 20.

The square root of 1191323 is about 1091.4774390705. The cubic root of 1191323 is about 106.0091068478.

The spelling of 1191323 in words is "one million, one hundred ninety-one thousand, three hundred twenty-three".