170028139 has 4 divisors (see below), whose sum is σ = 170891424. Its totient is φ = 169164856.

The previous prime is 170028137. The next prime is 170028163. The reversal of 170028139 is 931820071.

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 170028139 - 2¹ = 170028137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 170028139.

It is not an unprimeable number, because it can be changed into a prime (170028137) 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 in 3 ways as a sum of consecutive naturals, for example, 431347 + ... + 431740.

It is an arithmetic number, because the mean of its divisors is an integer number (42722856).

Almost surely, 2^170028139 is an apocalyptic number.

170028139 is a deficient number, since it is larger than the sum of its proper divisors (863285).

170028139 is an equidigital number, since it uses as much as digits as its factorization.

170028139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863284.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 170028139 is about 13039.4838471467. The cubic root of 170028139 is about 553.9963887821.

The spelling of 170028139 in words is "one hundred seventy million, twenty-eight thousand, one hundred thirty-nine".