247889 has 2 divisors, whose sum is σ = 247890. Its totient is φ = 247888.

The previous prime is 247879. The next prime is 247901. The reversal of 247889 is 988742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193600 + 54289 = 440^2 + 233^2 .

It is a cyclic number.

It is not a de Polignac number, because 247889 - 2⁴ = 247873 is a prime.

It is a super-2 number, since 2×247889² = 122897912642, which contains 22 as substring.

It is a plaindrome in base 10.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is not a weakly prime, because it can be changed into another prime (247829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123944 + 123945.

It is an arithmetic number, because the mean of its divisors is an integer number (123945).

2²⁴⁷⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

247889 is a deficient number, since it is larger than the sum of its proper divisors (1).

247889 is an equidigital number, since it uses as much as digits as its factorization.

247889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 247889 is about 497.8845247645. The cubic root of 247889 is about 62.8182381745.

The spelling of 247889 in words is "two hundred forty-seven thousand, eight hundred eighty-nine".