170428871 has 4 divisors (see below), whose sum is σ = 170502600. Its totient is φ = 170355144.

The previous prime is 170428861. The next prime is 170428883. The reversal of 170428871 is 178824071.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 170428871 - 2⁶ = 170428807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170428801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33281 + ... + 38058.

It is an arithmetic number, because the mean of its divisors is an integer number (42625650).

Almost surely, 2^170428871 is an apocalyptic number.

170428871 is a deficient number, since it is larger than the sum of its proper divisors (73729).

170428871 is an equidigital number, since it uses as much as digits as its factorization.

170428871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73728.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 170428871 is about 13054.8409028988. The cubic root of 170428871 is about 554.4312773826.

The spelling of 170428871 in words is "one hundred seventy million, four hundred twenty-eight thousand, eight hundred seventy-one".