1097311 has 4 divisors (see below), whose sum is σ = 1100232. Its totient is φ = 1094392.

The previous prime is 1097297. The next prime is 1097321. The reversal of 1097311 is 1137901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1137901 = 229 ⋅4969.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1097311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796 + ... + 1681.

It is an arithmetic number, because the mean of its divisors is an integer number (275058).

2^1097311 is an apocalyptic number.

1097311 is a deficient number, since it is larger than the sum of its proper divisors (2921).

1097311 is an equidigital number, since it uses as much as digits as its factorization.

1097311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920.

The product of its (nonzero) digits is 189, while the sum is 22.

The square root of 1097311 is about 1047.5261333256. The cubic root of 1097311 is about 103.1438277225.

The spelling of 1097311 in words is "one million, ninety-seven thousand, three hundred eleven".