111709849 has 16 divisors (see below), whose sum is σ = 117113040. Its totient is φ = 106479360.

The previous prime is 111709831. The next prime is 111709859. The reversal of 111709849 is 948907111.

It can be written as a sum of positive squares in 8 ways, for example, as 13838400 + 97871449 = 3720^2 + 9893^2 .

It is a cyclic number.

It is not a de Polignac number, because 111709849 - 2⁵ = 111709817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111709859) 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, 352239 + ... + 352555.

It is an arithmetic number, because the mean of its divisors is an integer number (7319565).

Almost surely, 2^111709849 is an apocalyptic number.

It is an amenable number.

111709849 is a deficient number, since it is larger than the sum of its proper divisors (5403191).

111709849 is a wasteful number, since it uses less digits than its factorization.

111709849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 111709849 is about 10569.2880081867. The cubic root of 111709849 is about 481.6118397755.

The spelling of 111709849 in words is "one hundred eleven million, seven hundred nine thousand, eight hundred forty-nine".