170442109 has 2 divisors, whose sum is σ = 170442110. Its totient is φ = 170442108.

The previous prime is 170442073. The next prime is 170442157. The reversal of 170442109 is 901244071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85618009 + 84824100 = 9253^2 + 9210^2 .

It is a cyclic number.

It is not a de Polignac number, because 170442109 - 2²⁵ = 136887677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170442199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85221054 + 85221055.

It is an arithmetic number, because the mean of its divisors is an integer number (85221055).

Almost surely, 2^170442109 is an apocalyptic number.

It is an amenable number.

170442109 is a deficient number, since it is larger than the sum of its proper divisors (1).

170442109 is an equidigital number, since it uses as much as digits as its factorization.

170442109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 170442109 is about 13055.3479080414. The cubic root of 170442109 is about 554.4456320929.

The spelling of 170442109 in words is "one hundred seventy million, four hundred forty-two thousand, one hundred nine".