128548613 has 2 divisors, whose sum is σ = 128548614. Its totient is φ = 128548612.

The previous prime is 128548603. The next prime is 128548631. The reversal of 128548613 is 316845821.

Together with next prime (128548631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85803169 + 42745444 = 9263^2 + 6538^2 .

It is a cyclic number.

It is not a de Polignac number, because 128548613 - 2⁶ = 128548549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128548603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64274306 + 64274307.

It is an arithmetic number, because the mean of its divisors is an integer number (64274307).

Almost surely, 2^128548613 is an apocalyptic number.

It is an amenable number.

128548613 is a deficient number, since it is larger than the sum of its proper divisors (1).

128548613 is an equidigital number, since it uses as much as digits as its factorization.

128548613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 38.

The square root of 128548613 is about 11337.9280735062. The cubic root of 128548613 is about 504.6874031822.

The spelling of 128548613 in words is "one hundred twenty-eight million, five hundred forty-eight thousand, six hundred thirteen".