111389729 has 16 divisors (see below), whose sum is σ = 131103360. Its totient is φ = 93500160.

The previous prime is 111389717. The next prime is 111389741. The reversal of 111389729 is 927983111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111389717) and next prime (111389741).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111389729 is a prime.

It is a super-3 number, since 3×111389729³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111389329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4292 + ... + 15530.

It is an arithmetic number, because the mean of its divisors is an integer number (8193960).

Almost surely, 2^111389729 is an apocalyptic number.

It is an amenable number.

111389729 is a deficient number, since it is larger than the sum of its proper divisors (19713631).

111389729 is a wasteful number, since it uses less digits than its factorization.

111389729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11320.

The product of its digits is 27216, while the sum is 41.

The square root of 111389729 is about 10554.1332661664. The cubic root of 111389729 is about 481.1513578903.

The spelling of 111389729 in words is "one hundred eleven million, three hundred eighty-nine thousand, seven hundred twenty-nine".