247393 has 2 divisors, whose sum is σ = 247394. Its totient is φ = 247392.

The previous prime is 247391. The next prime is 247409. The reversal of 247393 is 393742.

247393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242064 + 5329 = 492^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 247393 - 2¹ = 247391 is a prime.

It is a super-2 number, since 2×247393² = 122406592898, which contains 22 as substring.

Together with 247391, it forms a pair of twin primes.

247393 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (247391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123696 + 123697.

It is an arithmetic number, because the mean of its divisors is an integer number (123697).

2²⁴⁷³⁹³ is an apocalyptic number.

It is an amenable number.

247393 is a deficient number, since it is larger than the sum of its proper divisors (1).

247393 is an equidigital number, since it uses as much as digits as its factorization.

247393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 28.

The square root of 247393 is about 497.3861678817. The cubic root of 247393 is about 62.7763126212.

It can be divided in two parts, 24739 and 3, that added together give a palindrome (24742).

The spelling of 247393 in words is "two hundred forty-seven thousand, three hundred ninety-three".