24239989 has 2 divisors, whose sum is σ = 24239990. Its totient is φ = 24239988.

The previous prime is 24239987. The next prime is 24240019. The reversal of 24239989 is 98993242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14691889 + 9548100 = 3833^2 + 3090^2 .

It is a cyclic number.

It is not a de Polignac number, because 24239989 - 2¹ = 24239987 is a prime.

Together with 24239987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24239987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12119994 + 12119995.

It is an arithmetic number, because the mean of its divisors is an integer number (12119995).

Almost surely, 2^24239989 is an apocalyptic number.

It is an amenable number.

24239989 is a deficient number, since it is larger than the sum of its proper divisors (1).

24239989 is an equidigital number, since it uses as much as digits as its factorization.

24239989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 24239989 is about 4923.4123329252. The cubic root of 24239989 is about 289.4081826863.

The spelling of 24239989 in words is "twenty-four million, two hundred thirty-nine thousand, nine hundred eighty-nine".