247693 has 2 divisors, whose sum is σ = 247694. Its totient is φ = 247692.

The previous prime is 247691. The next prime is 247697. The reversal of 247693 is 396742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227529 + 20164 = 477^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 247693 - 2¹ = 247691 is a prime.

It is a super-2 number, since 2×247693² = 122703644498, which contains 22 as substring.

Together with 247691, it forms a pair of twin primes.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247691) 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, 123846 + 123847.

It is an arithmetic number, because the mean of its divisors is an integer number (123847).

2²⁴⁷⁶⁹³ is an apocalyptic number.

It is an amenable number.

247693 is a deficient number, since it is larger than the sum of its proper divisors (1).

247693 is an equidigital number, since it uses as much as digits as its factorization.

247693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 247693 is about 497.6876530516. The cubic root of 247693 is about 62.8016775080.

It can be divided in two parts, 247 and 693, that multiplied together give a palindrome (171171).

The spelling of 247693 in words is "two hundred forty-seven thousand, six hundred ninety-three".