1131111309 has 8 divisors (see below), whose sum is σ = 1508521792. Its totient is φ = 753887520.

The previous prime is 1131111283. The next prime is 1131111313. The reversal of 1131111309 is 9031111311.

1131111309 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1131111309 - 2¹¹ = 1131109261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131111329) 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, 31864 + ... + 57249.

It is an arithmetic number, because the mean of its divisors is an integer number (188565224).

Almost surely, 2^1131111309 is an apocalyptic number.

It is an amenable number.

1131111309 is a deficient number, since it is larger than the sum of its proper divisors (377410483).

1131111309 is an equidigital number, since it uses as much as digits as its factorization.

1131111309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93347.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 1131111309 is about 33631.9982903187. The cubic root of 1131111309 is about 1041.9217760866.

The spelling of 1131111309 in words is "one billion, one hundred thirty-one million, one hundred eleven thousand, three hundred nine".