128738713 has 2 divisors, whose sum is σ = 128738714. Its totient is φ = 128738712.

The previous prime is 128738693. The next prime is 128738717. The reversal of 128738713 is 317837821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75550864 + 53187849 = 8692^2 + 7293^2 .

It is a cyclic number.

It is not a de Polignac number, because 128738713 - 2¹³ = 128730521 is a prime.

It is not a weakly prime, because it can be changed into another prime (128738717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64369356 + 64369357.

It is an arithmetic number, because the mean of its divisors is an integer number (64369357).

Almost surely, 2^128738713 is an apocalyptic number.

It is an amenable number.

128738713 is a deficient number, since it is larger than the sum of its proper divisors (1).

128738713 is an equidigital number, since it uses as much as digits as its factorization.

128738713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 128738713 is about 11346.3083423640. The cubic root of 128738713 is about 504.9360609177.

It can be divided in two parts, 1287 and 38713, that added together give a square (40000 = 200²).

The spelling of 128738713 in words is "one hundred twenty-eight million, seven hundred thirty-eight thousand, seven hundred thirteen".