128709023 has 8 divisors (see below), whose sum is σ = 136586592. Its totient is φ = 120865536.

The previous prime is 128708999. The next prime is 128709029. The reversal of 128709023 is 320907821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128709023 - 2²⁶ = 61600159 is a prime.

It is a super-2 number, since 2×128709023² = 33132025203229058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128709029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515 + ... + 16052.

It is an arithmetic number, because the mean of its divisors is an integer number (17073324).

Almost surely, 2^128709023 is an apocalyptic number.

128709023 is a deficient number, since it is larger than the sum of its proper divisors (7877569).

128709023 is a wasteful number, since it uses less digits than its factorization.

128709023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17041.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 128709023 is about 11344.9999118554. Note that the first 4 decimals coincide. The cubic root of 128709023 is about 504.8972414518.

The spelling of 128709023 in words is "one hundred twenty-eight million, seven hundred nine thousand, twenty-three".