111908749 has 2 divisors, whose sum is σ = 111908750. Its totient is φ = 111908748.

The previous prime is 111908743. The next prime is 111908801. The reversal of 111908749 is 947809111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69006249 + 42902500 = 8307^2 + 6550^2 .

It is an emirp because it is prime and its reverse (947809111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111908749 - 2¹¹ = 111906701 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111908743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55954374 + 55954375.

It is an arithmetic number, because the mean of its divisors is an integer number (55954375).

Almost surely, 2^111908749 is an apocalyptic number.

It is an amenable number.

111908749 is a deficient number, since it is larger than the sum of its proper divisors (1).

111908749 is an equidigital number, since it uses as much as digits as its factorization.

111908749 is an evil number, because the sum of its binary digits is even.

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

The square root of 111908749 is about 10578.6931612558. The cubic root of 111908749 is about 481.8975078071.

The spelling of 111908749 in words is "one hundred eleven million, nine hundred eight thousand, seven hundred forty-nine".