247933 has 4 divisors (see below), whose sum is σ = 283360. Its totient is φ = 212508.

The previous prime is 247913. The next prime is 247939. The reversal of 247933 is 339742.

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 not a de Polignac number, because 247933 - 2⁵ = 247901 is a prime.

It is a super-2 number, since 2×247933² = 122941544978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247939) 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 in 3 ways as a sum of consecutive naturals, for example, 17703 + ... + 17716.

It is an arithmetic number, because the mean of its divisors is an integer number (70840).

2²⁴⁷⁹³³ is an apocalyptic number.

It is an amenable number.

247933 is a deficient number, since it is larger than the sum of its proper divisors (35427).

247933 is an equidigital number, since it uses as much as digits as its factorization.

247933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35426.

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

The square root of 247933 is about 497.9287097567. The cubic root of 247933 is about 62.8219546752.

Subtracting 247933 from its reverse (339742), we obtain a square (91809 = 303²).

The spelling of 247933 in words is "two hundred forty-seven thousand, nine hundred thirty-three".