24779 has 4 divisors (see below), whose sum is σ = 25200. Its totient is φ = 24360.

The previous prime is 24767. The next prime is 24781. The reversal of 24779 is 97742.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97742 = 2 ⋅48871.

It is a cyclic number.

It is not a de Polignac number, because 24779 - 2⁴ = 24763 is a prime.

It is a super-2 number, since 2×24779² = 1227997682, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (24709) 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, 104 + ... + 245.

It is an arithmetic number, because the mean of its divisors is an integer number (6300).

2²⁴⁷⁷⁹ is an apocalyptic number.

24779 is a deficient number, since it is larger than the sum of its proper divisors (421).

24779 is an equidigital number, since it uses as much as digits as its factorization.

24779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420.

The product of its digits is 3528, while the sum is 29.

The square root of 24779 is about 157.4134682929. The cubic root of 24779 is about 29.1537611839.

The spelling of 24779 in words is "twenty-four thousand, seven hundred seventy-nine".