170489729 has 2 divisors, whose sum is σ = 170489730. Its totient is φ = 170489728.

The previous prime is 170489723. The next prime is 170489743. The reversal of 170489729 is 927984071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147064129 + 23425600 = 12127^2 + 4840^2 .

It is a cyclic number.

It is not a de Polignac number, because 170489729 - 2⁴ = 170489713 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (170489723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85244864 + 85244865.

It is an arithmetic number, because the mean of its divisors is an integer number (85244865).

Almost surely, 2^170489729 is an apocalyptic number.

It is an amenable number.

170489729 is a deficient number, since it is larger than the sum of its proper divisors (1).

170489729 is an equidigital number, since it uses as much as digits as its factorization.

170489729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 170489729 is about 13057.1715543605. The cubic root of 170489729 is about 554.4972630008.

The spelling of 170489729 in words is "one hundred seventy million, four hundred eighty-nine thousand, seven hundred twenty-nine".