111109949 has 2 divisors, whose sum is σ = 111109950. Its totient is φ = 111109948.

The previous prime is 111109939. The next prime is 111109961. The reversal of 111109949 is 949901111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88021924 + 23088025 = 9382^2 + 4805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111109949 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 (111109939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55554974 + 55554975.

It is an arithmetic number, because the mean of its divisors is an integer number (55554975).

Almost surely, 2^111109949 is an apocalyptic number.

It is an amenable number.

111109949 is a deficient number, since it is larger than the sum of its proper divisors (1).

111109949 is an equidigital number, since it uses as much as digits as its factorization.

111109949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 35.

The square root of 111109949 is about 10540.8704099804. The cubic root of 111109949 is about 480.7481807090.

The spelling of 111109949 in words is "one hundred eleven million, one hundred nine thousand, nine hundred forty-nine".