870229 has 2 divisors, whose sum is σ = 870230. Its totient is φ = 870228.

The previous prime is 870223. The next prime is 870239. The reversal of 870229 is 922078.

870229 is nontrivially palindromic in base 9.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 864900 + 5329 = 930^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 870229 - 2⁵ = 870197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 870197 and 870206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435114 + 435115.

It is an arithmetic number, because the mean of its divisors is an integer number (435115).

2⁸⁷⁰²²⁹ is an apocalyptic number.

It is an amenable number.

870229 is a deficient number, since it is larger than the sum of its proper divisors (1).

870229 is an equidigital number, since it uses as much as digits as its factorization.

870229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 870229 is about 932.8606541172. The cubic root of 870229 is about 95.4724023213.

The spelling of 870229 in words is "eight hundred seventy thousand, two hundred twenty-nine".