870220229 has 2 divisors, whose sum is σ = 870220230. Its totient is φ = 870220228.

The previous prime is 870220217. The next prime is 870220289. The reversal of 870220229 is 922022078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 868657729 + 1562500 = 29473^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 870220229 - 2⁴ = 870220213 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 870220195 and 870220204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870220289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435110114 + 435110115.

It is an arithmetic number, because the mean of its divisors is an integer number (435110115).

Almost surely, 2^870220229 is an apocalyptic number.

It is an amenable number.

870220229 is a deficient number, since it is larger than the sum of its proper divisors (1).

870220229 is an equidigital number, since it uses as much as digits as its factorization.

870220229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 870220229 is about 29499.4954024641. The cubic root of 870220229 is about 954.7208156620.

The spelling of 870220229 in words is "eight hundred seventy million, two hundred twenty thousand, two hundred twenty-nine".