111609134 has 32 divisors (see below), whose sum is σ = 211087296. Its totient is φ = 43073280.

The previous prime is 111609109. The next prime is 111609137. The reversal of 111609134 is 431906111.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111609137) 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 15 ways as a sum of consecutive naturals, for example, 17 + ... + 14940.

It is an arithmetic number, because the mean of its divisors is an integer number (6596478).

Almost surely, 2^111609134 is an apocalyptic number.

111609134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

111609134 is a deficient number, since it is larger than the sum of its proper divisors (99478162).

111609134 is a wasteful number, since it uses less digits than its factorization.

111609134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15020.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 111609134 is about 10564.5224217662. The cubic root of 111609134 is about 481.4670595813.

The spelling of 111609134 in words is "one hundred eleven million, six hundred nine thousand, one hundred thirty-four".