128736851 has 2 divisors, whose sum is σ = 128736852. Its totient is φ = 128736850.

The previous prime is 128736821. The next prime is 128736871. The reversal of 128736851 is 158637821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128736851 - 2⁶ = 128736787 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 128736799 and 128736808.

It is not a weakly prime, because it can be changed into another prime (128736821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64368425 + 64368426.

It is an arithmetic number, because the mean of its divisors is an integer number (64368426).

Almost surely, 2^128736851 is an apocalyptic number.

128736851 is a deficient number, since it is larger than the sum of its proper divisors (1).

128736851 is an equidigital number, since it uses as much as digits as its factorization.

128736851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 128736851 is about 11346.2262889474. The cubic root of 128736851 is about 504.9336265413.

The spelling of 128736851 in words is "one hundred twenty-eight million, seven hundred thirty-six thousand, eight hundred fifty-one".