109928989 has 2 divisors, whose sum is σ = 109928990. Its totient is φ = 109928988.

The previous prime is 109928939. The next prime is 109929011. The reversal of 109928989 is 989829901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91584900 + 18344089 = 9570^2 + 4283^2 .

It is a cyclic number.

It is not a de Polignac number, because 109928989 - 2²¹ = 107831837 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 (109928909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54964494 + 54964495.

It is an arithmetic number, because the mean of its divisors is an integer number (54964495).

Almost surely, 2^109928989 is an apocalyptic number.

It is an amenable number.

109928989 is a deficient number, since it is larger than the sum of its proper divisors (1).

109928989 is an equidigital number, since it uses as much as digits as its factorization.

109928989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 55.

The square root of 109928989 is about 10484.7026185772. The cubic root of 109928989 is about 479.0388594163.

The spelling of 109928989 in words is "one hundred nine million, nine hundred twenty-eight thousand, nine hundred eighty-nine".