111311309 has 8 divisors (see below), whose sum is σ = 116060160. Its totient is φ = 106623216.

The previous prime is 111311303. The next prime is 111311341. The reversal of 111311309 is 903113111.

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 111311309 - 2¹² = 111307213 is a prime.

It is a super-2 number, since 2×111311309² = 24780415022586962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111311303) 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, 11429 + ... + 18794.

It is an arithmetic number, because the mean of its divisors is an integer number (14507520).

Almost surely, 2^111311309 is an apocalyptic number.

It is an amenable number.

111311309 is a deficient number, since it is larger than the sum of its proper divisors (4748851).

111311309 is a wasteful number, since it uses less digits than its factorization.

111311309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30379.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 111311309 is about 10550.4174798915. The cubic root of 111311309 is about 481.0384188491.

The spelling of 111311309 in words is "one hundred eleven million, three hundred eleven thousand, three hundred nine".