247439 has 2 divisors, whose sum is σ = 247440. Its totient is φ = 247438.

The previous prime is 247433. The next prime is 247451. The reversal of 247439 is 934742.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247439 - 2⁸ = 247183 is a prime.

It is a super-2 number, since 2×247439² = 122452117442, 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 (247433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123719 + 123720.

It is an arithmetic number, because the mean of its divisors is an integer number (123720).

2²⁴⁷⁴³⁹ is an apocalyptic number.

247439 is a deficient number, since it is larger than the sum of its proper divisors (1).

247439 is an equidigital number, since it uses as much as digits as its factorization.

247439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 29.

The square root of 247439 is about 497.4324074686. The cubic root of 247439 is about 62.7802032344.

It can be divided in two parts, 247 and 439, that added together give a palindrome (686).

The spelling of 247439 in words is "two hundred forty-seven thousand, four hundred thirty-nine".