128703893 has 2 divisors, whose sum is σ = 128703894. Its totient is φ = 128703892.

The previous prime is 128703863. The next prime is 128703899. The reversal of 128703893 is 398307821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81685444 + 47018449 = 9038^2 + 6857^2 .

It is a cyclic number.

It is not a de Polignac number, because 128703893 - 2⁶ = 128703829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128703893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128703899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64351946 + 64351947.

It is an arithmetic number, because the mean of its divisors is an integer number (64351947).

Almost surely, 2^128703893 is an apocalyptic number.

It is an amenable number.

128703893 is a deficient number, since it is larger than the sum of its proper divisors (1).

128703893 is an equidigital number, since it uses as much as digits as its factorization.

128703893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 128703893 is about 11344.7738188119. The cubic root of 128703893 is about 504.8905334081.

The spelling of 128703893 in words is "one hundred twenty-eight million, seven hundred three thousand, eight hundred ninety-three".