247973 has 4 divisors (see below), whose sum is σ = 270528. Its totient is φ = 225420.

The previous prime is 247957. The next prime is 247991. The reversal of 247973 is 379742.

It is a happy number.

247973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 247973 - 2⁴ = 247957 is a prime.

It is a super-2 number, since 2×247973² = 122981217458, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11261 + ... + 11282.

It is an arithmetic number, because the mean of its divisors is an integer number (67632).

2²⁴⁷⁹⁷³ is an apocalyptic number.

It is an amenable number.

247973 is a deficient number, since it is larger than the sum of its proper divisors (22555).

247973 is a wasteful number, since it uses less digits than its factorization.

247973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22554.

The product of its digits is 10584, while the sum is 32.

The square root of 247973 is about 497.9688745293. The cubic root of 247973 is about 62.8253329307.

Subtracting 247973 from its reverse (379742), we obtain a square (131769 = 363²).

It can be divided in two parts, 2479 and 73, that added together give a palindrome (2552).

The spelling of 247973 in words is "two hundred forty-seven thousand, nine hundred seventy-three".