170328121 has 2 divisors, whose sum is σ = 170328122. Its totient is φ = 170328120.

The previous prime is 170328091. The next prime is 170328149. The reversal of 170328121 is 121823071.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165765625 + 4562496 = 12875^2 + 2136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170328121 is a prime.

It is not a weakly prime, because it can be changed into another prime (170328181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85164060 + 85164061.

It is an arithmetic number, because the mean of its divisors is an integer number (85164061).

Almost surely, 2^170328121 is an apocalyptic number.

It is an amenable number.

170328121 is a deficient number, since it is larger than the sum of its proper divisors (1).

170328121 is an equidigital number, since it uses as much as digits as its factorization.

170328121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 170328121 is about 13050.9816105916. The cubic root of 170328121 is about 554.3220041091.

The spelling of 170328121 in words is "one hundred seventy million, three hundred twenty-eight thousand, one hundred twenty-one".