128523713 has 2 divisors, whose sum is σ = 128523714. Its totient is φ = 128523712.

The previous prime is 128523691. The next prime is 128523763. The reversal of 128523713 is 317325821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128300929 + 222784 = 11327^2 + 472^2 .

It is a cyclic number.

It is not a de Polignac number, because 128523713 - 2⁶ = 128523649 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128523713.

It is not a weakly prime, because it can be changed into another prime (128523763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64261856 + 64261857.

It is an arithmetic number, because the mean of its divisors is an integer number (64261857).

Almost surely, 2^128523713 is an apocalyptic number.

It is an amenable number.

128523713 is a deficient number, since it is larger than the sum of its proper divisors (1).

128523713 is an equidigital number, since it uses as much as digits as its factorization.

128523713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 128523713 is about 11336.8299360977. The cubic root of 128523713 is about 504.6548149198.

The spelling of 128523713 in words is "one hundred twenty-eight million, five hundred twenty-three thousand, seven hundred thirteen".