128103723 has 12 divisors (see below), whose sum is σ = 201860568. Its totient is φ = 77638560.

The previous prime is 128103713. The next prime is 128103733. The reversal of 128103723 is 327301821.

It is an interprime number because it is at equal distance from previous prime (128103713) and next prime (128103733).

It is not a de Polignac number, because 128103723 - 2¹⁰ = 128102699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128103713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 646890 + ... + 647087.

It is an arithmetic number, because the mean of its divisors is an integer number (16821714).

Almost surely, 2^128103723 is an apocalyptic number.

128103723 is a deficient number, since it is larger than the sum of its proper divisors (73756845).

128103723 is a wasteful number, since it uses less digits than its factorization.

128103723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293994 (or 1293991 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 128103723 is about 11318.2915230171. The cubic root of 128103723 is about 504.1045111121.

The spelling of 128103723 in words is "one hundred twenty-eight million, one hundred three thousand, seven hundred twenty-three".