247279 has 2 divisors, whose sum is σ = 247280. Its totient is φ = 247278.

The previous prime is 247259. The next prime is 247301. The reversal of 247279 is 972742.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247279 - 2¹³ = 239087 is a prime.

It is a super-2 number, since 2×247279² = 122293807682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123639 + 123640.

It is an arithmetic number, because the mean of its divisors is an integer number (123640).

2²⁴⁷²⁷⁹ is an apocalyptic number.

247279 is a deficient number, since it is larger than the sum of its proper divisors (1).

247279 is an equidigital number, since it uses as much as digits as its factorization.

247279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 31.

The square root of 247279 is about 497.2715555911. The cubic root of 247279 is about 62.7666685876.

The spelling of 247279 in words is "two hundred forty-seven thousand, two hundred seventy-nine".