111949 has 2 divisors, whose sum is σ = 111950. Its totient is φ = 111948.

The previous prime is 111919. The next prime is 111953. The reversal of 111949 is 949111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59049 + 52900 = 243^2 + 230^2 .

It is an emirp because it is prime and its reverse (949111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111949 - 2⁷ = 111821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55974 + 55975.

It is an arithmetic number, because the mean of its divisors is an integer number (55975).

2¹¹¹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

111949 is a deficient number, since it is larger than the sum of its proper divisors (1).

111949 is an equidigital number, since it uses as much as digits as its factorization.

111949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 25.

The square root of 111949 is about 334.5878061137. The cubic root of 111949 is about 48.1955276694.

The spelling of 111949 in words is "one hundred eleven thousand, nine hundred forty-nine".