111945289 has 8 divisors (see below), whose sum is σ = 119619720. Its totient is φ = 104391936.

The previous prime is 111945287. The next prime is 111945299. The reversal of 111945289 is 982549111.

It can be written as a sum of positive squares in 4 ways, for example, as 64128064 + 47817225 = 8008^2 + 6915^2 .

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 111945289 - 2¹ = 111945287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111945287) 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, 28354 + ... + 32059.

It is an arithmetic number, because the mean of its divisors is an integer number (14952465).

Almost surely, 2^111945289 is an apocalyptic number.

It is an amenable number.

111945289 is a deficient number, since it is larger than the sum of its proper divisors (7674431).

111945289 is a wasteful number, since it uses less digits than its factorization.

111945289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60539.

The product of its digits is 25920, while the sum is 40.

The square root of 111945289 is about 10580.4200767266. The cubic root of 111945289 is about 481.9499511861.

The spelling of 111945289 in words is "one hundred eleven million, nine hundred forty-five thousand, two hundred eighty-nine".