170473489 has 2 divisors, whose sum is σ = 170473490. Its totient is φ = 170473488.

The previous prime is 170473487. The next prime is 170473517. The reversal of 170473489 is 984374071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163635264 + 6838225 = 12792^2 + 2615^2 .

It is an emirp because it is prime and its reverse (984374071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 170473489 - 2¹ = 170473487 is a prime.

It is a super-2 number, since 2×170473489² = 58122420903666242, which contains 22 as substring.

Together with 170473487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (170473481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85236744 + 85236745.

It is an arithmetic number, because the mean of its divisors is an integer number (85236745).

Almost surely, 2^170473489 is an apocalyptic number.

It is an amenable number.

170473489 is a deficient number, since it is larger than the sum of its proper divisors (1).

170473489 is an equidigital number, since it uses as much as digits as its factorization.

170473489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 170473489 is about 13056.5496590792. The cubic root of 170473489 is about 554.4796562286.

The spelling of 170473489 in words is "one hundred seventy million, four hundred seventy-three thousand, four hundred eighty-nine".