24391321 has 2 divisors, whose sum is σ = 24391322. Its totient is φ = 24391320.

The previous prime is 24391319. The next prime is 24391333. The reversal of 24391321 is 12319342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24364096 + 27225 = 4936^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 24391321 - 2¹ = 24391319 is a prime.

Together with 24391319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (24391361) 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 as a sum of consecutive naturals, namely, 12195660 + 12195661.

It is an arithmetic number, because the mean of its divisors is an integer number (12195661).

Almost surely, 2^24391321 is an apocalyptic number.

It is an amenable number.

24391321 is a deficient number, since it is larger than the sum of its proper divisors (1).

24391321 is an equidigital number, since it uses as much as digits as its factorization.

24391321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 24391321 is about 4938.7570298609. The cubic root of 24391321 is about 290.0091990740.

The spelling of 24391321 in words is "twenty-four million, three hundred ninety-one thousand, three hundred twenty-one".