247235189 has 2 divisors, whose sum is σ = 247235190. Its totient is φ = 247235188.

The previous prime is 247235167. The next prime is 247235227. The reversal of 247235189 is 981532742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168558289 + 78676900 = 12983^2 + 8870^2 .

It is a cyclic number.

It is not a de Polignac number, because 247235189 - 2²⁰ = 246186613 is a prime.

It is a super-2 number, since 2×247235189² = 122250477359731442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247232189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123617594 + 123617595.

It is an arithmetic number, because the mean of its divisors is an integer number (123617595).

Almost surely, 2^247235189 is an apocalyptic number.

It is an amenable number.

247235189 is a deficient number, since it is larger than the sum of its proper divisors (1).

247235189 is an equidigital number, since it uses as much as digits as its factorization.

247235189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 247235189 is about 15723.7142240630. The cubic root of 247235189 is about 627.6296152942.

The spelling of 247235189 in words is "two hundred forty-seven million, two hundred thirty-five thousand, one hundred eighty-nine".