17128939 has 16 divisors (see below), whose sum is σ = 18275040. Its totient is φ = 16035840.

The previous prime is 17128931. The next prime is 17128949. The reversal of 17128939 is 93982171.

It is a cyclic number.

It is not a de Polignac number, because 17128939 - 2³ = 17128931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17128931) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176539 + ... + 176635.

It is an arithmetic number, because the mean of its divisors is an integer number (1142190).

Almost surely, 2^17128939 is an apocalyptic number.

17128939 is a deficient number, since it is larger than the sum of its proper divisors (1146101).

17128939 is an equidigital number, since it uses as much as digits as its factorization.

17128939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270.

The product of its digits is 27216, while the sum is 40.

The square root of 17128939 is about 4138.7122393324. The cubic root of 17128939 is about 257.7765978705.

The spelling of 17128939 in words is "seventeen million, one hundred twenty-eight thousand, nine hundred thirty-nine".