247297 has 4 divisors (see below), whose sum is σ = 251056. Its totient is φ = 243540.

The previous prime is 247279. The next prime is 247301. The reversal of 247297 is 792742.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247297 is a prime.

It is a super-2 number, since 2×247297² = 122311612418, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1779 + ... + 1912.

It is an arithmetic number, because the mean of its divisors is an integer number (62764).

It is a Proth number, since it is equal to 483 ⋅ 2⁹ + 1 and 483 < 2⁹.

2²⁴⁷²⁹⁷ is an apocalyptic number.

It is an amenable number.

247297 is a deficient number, since it is larger than the sum of its proper divisors (3759).

247297 is an equidigital number, since it uses as much as digits as its factorization.

247297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3758.

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

The square root of 247297 is about 497.2896540247. The cubic root of 247297 is about 62.7681915268.

The spelling of 247297 in words is "two hundred forty-seven thousand, two hundred ninety-seven".