128861093 has 2 divisors, whose sum is σ = 128861094. Its totient is φ = 128861092.

The previous prime is 128861081. The next prime is 128861143. The reversal of 128861093 is 390168821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88322404 + 40538689 = 9398^2 + 6367^2 .

It is a cyclic number.

It is not a de Polignac number, because 128861093 - 2²⁴ = 112083877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128861023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64430546 + 64430547.

It is an arithmetic number, because the mean of its divisors is an integer number (64430547).

Almost surely, 2^128861093 is an apocalyptic number.

It is an amenable number.

128861093 is a deficient number, since it is larger than the sum of its proper divisors (1).

128861093 is an equidigital number, since it uses as much as digits as its factorization.

128861093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 128861093 is about 11351.7000048451. The cubic root of 128861093 is about 505.0960089328.

The spelling of 128861093 in words is "one hundred twenty-eight million, eight hundred sixty-one thousand, ninety-three".