247797 has 12 divisors (see below), whose sum is σ = 390624. Its totient is φ = 150120.

The previous prime is 247781. The next prime is 247799. The reversal of 247797 is 797742.

It is not a de Polignac number, because 247797 - 2⁴ = 247781 is a prime.

It is a super-2 number, since 2×247797² = 122806706418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247799) 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 in 11 ways as a sum of consecutive naturals, for example, 1153 + ... + 1350.

It is an arithmetic number, because the mean of its divisors is an integer number (32552).

2²⁴⁷⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

247797 is a deficient number, since it is larger than the sum of its proper divisors (142827).

247797 is a wasteful number, since it uses less digits than its factorization.

247797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520 (or 2517 counting only the distinct ones).

The product of its digits is 24696, while the sum is 36.

The square root of 247797 is about 497.7921252893. The cubic root of 247797 is about 62.8104658879.

Subtracting 247797 from its reverse (797742), we obtain a palindrome (549945).

The spelling of 247797 in words is "two hundred forty-seven thousand, seven hundred ninety-seven".