247229 has 2 divisors, whose sum is σ = 247230. Its totient is φ = 247228.

The previous prime is 247223. The next prime is 247241. The reversal of 247229 is 922742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156025 + 91204 = 395^2 + 302^2 .

It is a cyclic number.

It is not a de Polignac number, because 247229 - 2¹⁶ = 181693 is a prime.

It is a super-3 number, since 3×247229³ = 45333525161369967, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 247198 and 247207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123614 + 123615.

It is an arithmetic number, because the mean of its divisors is an integer number (123615).

2²⁴⁷²²⁹ is an apocalyptic number.

It is an amenable number.

247229 is a deficient number, since it is larger than the sum of its proper divisors (1).

247229 is an equidigital number, since it uses as much as digits as its factorization.

247229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 247229 is about 497.2212787080. The cubic root of 247229 is about 62.7624378132.

The spelling of 247229 in words is "two hundred forty-seven thousand, two hundred twenty-nine".