247847 has 2 divisors, whose sum is σ = 247848. Its totient is φ = 247846.

The previous prime is 247829. The next prime is 247853. The reversal of 247847 is 748742.

247847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 247847 - 2⁸ = 247591 is a prime.

It is a super-2 number, since 2×247847² = 122856270818, 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 (247547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123923 + 123924.

It is an arithmetic number, because the mean of its divisors is an integer number (123924).

2²⁴⁷⁸⁴⁷ is an apocalyptic number.

247847 is a deficient number, since it is larger than the sum of its proper divisors (1).

247847 is an equidigital number, since it uses as much as digits as its factorization.

247847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12544, while the sum is 32.

The square root of 247847 is about 497.8423445228. The cubic root of 247847 is about 62.8146901953.

The spelling of 247847 in words is "two hundred forty-seven thousand, eight hundred forty-seven".