128336723 has 16 divisors (see below), whose sum is σ = 138297600. Its totient is φ = 118665216.

The previous prime is 128336713. The next prime is 128336749. The reversal of 128336723 is 327633821.

It is a cyclic number.

It is not a de Polignac number, because 128336723 - 2¹⁸ = 128074579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128336713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367553 + ... + 367901.

It is an arithmetic number, because the mean of its divisors is an integer number (8643600).

Almost surely, 2^128336723 is an apocalyptic number.

128336723 is a deficient number, since it is larger than the sum of its proper divisors (9960877).

128336723 is a wasteful number, since it uses less digits than its factorization.

128336723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686.

The product of its digits is 36288, while the sum is 35.

The square root of 128336723 is about 11328.5799198311. The cubic root of 128336723 is about 504.4099542557.

The spelling of 128336723 in words is "one hundred twenty-eight million, three hundred thirty-six thousand, seven hundred twenty-three".