111136789 has 6 divisors (see below), whose sum is σ = 114223074. Its totient is φ = 108131760.

The previous prime is 111136777. The next prime is 111136793. The reversal of 111136789 is 987631111.

It can be written as a sum of positive squares in 3 ways, for example, as 69856164 + 41280625 = 8358^2 + 6425^2 .

It is not a de Polignac number, because 111136789 - 2⁷ = 111136661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111136709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39222 + ... + 41959.

It is an arithmetic number, because the mean of its divisors is an integer number (19037179).

Almost surely, 2^111136789 is an apocalyptic number.

It is an amenable number.

111136789 is a deficient number, since it is larger than the sum of its proper divisors (3086285).

111136789 is an frugal number, since it uses more digits than its factorization.

111136789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81255 (or 81218 counting only the distinct ones).

The product of its digits is 9072, while the sum is 37.

The square root of 111136789 is about 10542.1434727478. The cubic root of 111136789 is about 480.7868878409.

It can be divided in two parts, 111 and 136789, that added together give a square (136900 = 370²).

The spelling of 111136789 in words is "one hundred eleven million, one hundred thirty-six thousand, seven hundred eighty-nine".