247447163 has 2 divisors, whose sum is σ = 247447164. Its totient is φ = 247447162.

The previous prime is 247447117. The next prime is 247447199. The reversal of 247447163 is 361744742.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 247447163 - 2⁶ = 247447099 is a prime.

It is a super-2 number, since 2×247447163² = 122460196953497138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247447103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123723581 + 123723582.

It is an arithmetic number, because the mean of its divisors is an integer number (123723582).

Almost surely, 2^247447163 is an apocalyptic number.

247447163 is a deficient number, since it is larger than the sum of its proper divisors (1).

247447163 is an equidigital number, since it uses as much as digits as its factorization.

247447163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 38.

The square root of 247447163 is about 15730.4533628246. The cubic root of 247447163 is about 627.8089359868.

The spelling of 247447163 in words is "two hundred forty-seven million, four hundred forty-seven thousand, one hundred sixty-three".