870169 has 2 divisors, whose sum is σ = 870170. Its totient is φ = 870168.

The previous prime is 870161. The next prime is 870173. The reversal of 870169 is 961078.

870169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632025 + 238144 = 795^2 + 488^2 .

It is a cyclic number.

It is not a de Polignac number, because 870169 - 2³ = 870161 is a prime.

It is a super-2 number, since 2×870169² = 1514388177122, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 870169.

It is not a weakly prime, because it can be changed into another prime (870161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435084 + 435085.

It is an arithmetic number, because the mean of its divisors is an integer number (435085).

2⁸⁷⁰¹⁶⁹ is an apocalyptic number.

It is an amenable number.

870169 is a deficient number, since it is larger than the sum of its proper divisors (1).

870169 is an equidigital number, since it uses as much as digits as its factorization.

870169 is an evil number, because the sum of its binary digits is even.

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

The square root of 870169 is about 932.8284944190. The cubic root of 870169 is about 95.4702080806.

Subtracting 870169 from its reverse (961078), we obtain a palindrome (90909).

It can be divided in two parts, 87016 and 9, that added together give a square (87025 = 295²).

The spelling of 870169 in words is "eight hundred seventy thousand, one hundred sixty-nine".