128619613 has 2 divisors, whose sum is σ = 128619614. Its totient is φ = 128619612.

The previous prime is 128619593. The next prime is 128619629. The reversal of 128619613 is 316916821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94828644 + 33790969 = 9738^2 + 5813^2 .

It is a cyclic number.

It is not a de Polignac number, because 128619613 - 2²⁵ = 95065181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128617613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64309806 + 64309807.

It is an arithmetic number, because the mean of its divisors is an integer number (64309807).

Almost surely, 2^128619613 is an apocalyptic number.

It is an amenable number.

128619613 is a deficient number, since it is larger than the sum of its proper divisors (1).

128619613 is an equidigital number, since it uses as much as digits as its factorization.

128619613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 128619613 is about 11341.0587248281. The cubic root of 128619613 is about 504.7803024358.

The spelling of 128619613 in words is "one hundred twenty-eight million, six hundred nineteen thousand, six hundred thirteen".