128988149 has 2 divisors, whose sum is σ = 128988150. Its totient is φ = 128988148.

The previous prime is 128988137. The next prime is 128988157. The reversal of 128988149 is 941889821.

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., 128822500 + 165649 = 11350^2 + 407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128988149 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 128988097 and 128988106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128988049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64494074 + 64494075.

It is an arithmetic number, because the mean of its divisors is an integer number (64494075).

Almost surely, 2^128988149 is an apocalyptic number.

It is an amenable number.

128988149 is a deficient number, since it is larger than the sum of its proper divisors (1).

128988149 is an equidigital number, since it uses as much as digits as its factorization.

128988149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 50.

The square root of 128988149 is about 11357.2949684333. The cubic root of 128988149 is about 505.2619612680.

The spelling of 128988149 in words is "one hundred twenty-eight million, nine hundred eighty-eight thousand, one hundred forty-nine".