111688930 has 8 divisors (see below), whose sum is σ = 201040092. Its totient is φ = 44675568.

The previous prime is 111688919. The next prime is 111688937. The reversal of 111688930 is 39886111.

It can be written as a sum of positive squares in 2 ways, for example, as 108180801 + 3508129 = 10401^2 + 1873^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 111688930.

It is not an unprimeable number, because it can be changed into a prime (111688937) 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 3 ways as a sum of consecutive naturals, for example, 5584437 + ... + 5584456.

Almost surely, 2^111688930 is an apocalyptic number.

111688930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111688930 is a deficient number, since it is larger than the sum of its proper divisors (89351162).

111688930 is a wasteful number, since it uses less digits than its factorization.

111688930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11168900.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 111688930 is about 10568.2983493087. The cubic root of 111688930 is about 481.5817753807.

The spelling of 111688930 in words is "one hundred eleven million, six hundred eighty-eight thousand, nine hundred thirty".