111950989 has 2 divisors, whose sum is σ = 111950990. Its totient is φ = 111950988.

The previous prime is 111950977. The next prime is 111951041. The reversal of 111950989 is 989059111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56746089 + 55204900 = 7533^2 + 7430^2 .

It is a cyclic number.

It is not a de Polignac number, because 111950989 - 2⁹ = 111950477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111950689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55975494 + 55975495.

It is an arithmetic number, because the mean of its divisors is an integer number (55975495).

Almost surely, 2^111950989 is an apocalyptic number.

It is an amenable number.

111950989 is a deficient number, since it is larger than the sum of its proper divisors (1).

111950989 is an equidigital number, since it uses as much as digits as its factorization.

111950989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 43.

The square root of 111950989 is about 10580.6894387842. The cubic root of 111950989 is about 481.9581309797.

The spelling of 111950989 in words is "one hundred eleven million, nine hundred fifty thousand, nine hundred eighty-nine".