1116321391 has 8 divisors (see below), whose sum is σ = 1148009184. Its totient is φ = 1084846080.

The previous prime is 1116321373. The next prime is 1116321403. The reversal of 1116321391 is 1931236111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1116321391 - 2⁹ = 1116320879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116361391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42435 + ... + 63508.

It is an arithmetic number, because the mean of its divisors is an integer number (143501148).

Almost surely, 2^1116321391 is an apocalyptic number.

1116321391 is a deficient number, since it is larger than the sum of its proper divisors (31687793).

1116321391 is a wasteful number, since it uses less digits than its factorization.

1116321391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106241.

The product of its digits is 972, while the sum is 28.

The square root of 1116321391 is about 33411.3961246758. The cubic root of 1116321391 is about 1037.3605997640.

The spelling of 1116321391 in words is "one billion, one hundred sixteen million, three hundred twenty-one thousand, three hundred ninety-one".