111969449 has 2 divisors, whose sum is σ = 111969450. Its totient is φ = 111969448.

The previous prime is 111969439. The next prime is 111969457. The reversal of 111969449 is 944969111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103225600 + 8743849 = 10160^2 + 2957^2 .

It is an emirp because it is prime and its reverse (944969111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111969449 - 2¹² = 111965353 is a prime.

It is not a weakly prime, because it can be changed into another prime (111969419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55984724 + 55984725.

It is an arithmetic number, because the mean of its divisors is an integer number (55984725).

Almost surely, 2^111969449 is an apocalyptic number.

It is an amenable number.

111969449 is a deficient number, since it is larger than the sum of its proper divisors (1).

111969449 is an equidigital number, since it uses as much as digits as its factorization.

111969449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 44.

The square root of 111969449 is about 10581.5617467366. The cubic root of 111969449 is about 481.9846201253.

The spelling of 111969449 in words is "one hundred eleven million, nine hundred sixty-nine thousand, four hundred forty-nine".