128713237 has 2 divisors, whose sum is σ = 128713238. Its totient is φ = 128713236.

The previous prime is 128713177. The next prime is 128713243. The reversal of 128713237 is 732317821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126360081 + 2353156 = 11241^2 + 1534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128713237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128713297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64356618 + 64356619.

It is an arithmetic number, because the mean of its divisors is an integer number (64356619).

Almost surely, 2^128713237 is an apocalyptic number.

It is an amenable number.

128713237 is a deficient number, since it is larger than the sum of its proper divisors (1).

128713237 is an equidigital number, since it uses as much as digits as its factorization.

128713237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 128713237 is about 11345.1856309185. The cubic root of 128713237 is about 504.9027515906.

The spelling of 128713237 in words is "one hundred twenty-eight million, seven hundred thirteen thousand, two hundred thirty-seven".