111888149 has 2 divisors, whose sum is σ = 111888150. Its totient is φ = 111888148.

The previous prime is 111888121. The next prime is 111888151. The reversal of 111888149 is 941888111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95687524 + 16200625 = 9782^2 + 4025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111888149 is a prime.

Together with 111888151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111888449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55944074 + 55944075.

It is an arithmetic number, because the mean of its divisors is an integer number (55944075).

Almost surely, 2^111888149 is an apocalyptic number.

It is an amenable number.

111888149 is a deficient number, since it is larger than the sum of its proper divisors (1).

111888149 is an equidigital number, since it uses as much as digits as its factorization.

111888149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 41.

The square root of 111888149 is about 10577.7194612071. The cubic root of 111888149 is about 481.8679369948.

The spelling of 111888149 in words is "one hundred eleven million, eight hundred eighty-eight thousand, one hundred forty-nine".