128624149 has 2 divisors, whose sum is σ = 128624150. Its totient is φ = 128624148.

The previous prime is 128624147. The next prime is 128624161. The reversal of 128624149 is 941426821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109202500 + 19421649 = 10450^2 + 4407^2 .

It is a cyclic number.

It is not a de Polignac number, because 128624149 - 2¹ = 128624147 is a prime.

Together with 128624147, 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 (128624143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64312074 + 64312075.

It is an arithmetic number, because the mean of its divisors is an integer number (64312075).

Almost surely, 2^128624149 is an apocalyptic number.

It is an amenable number.

128624149 is a deficient number, since it is larger than the sum of its proper divisors (1).

128624149 is an equidigital number, since it uses as much as digits as its factorization.

128624149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The square root of 128624149 is about 11341.2587043943. The cubic root of 128624149 is about 504.7862363585.

The spelling of 128624149 in words is "one hundred twenty-eight million, six hundred twenty-four thousand, one hundred forty-nine".