24281989 has 2 divisors, whose sum is σ = 24281990. Its totient is φ = 24281988.

The previous prime is 24281987. The next prime is 24282047. The reversal of 24281989 is 98918242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24108100 + 173889 = 4910^2 + 417^2 .

It is a cyclic number.

It is not a de Polignac number, because 24281989 - 2¹ = 24281987 is a prime.

It is a super-2 number, since 2×24281989² = 1179229979592242, which contains 22 as substring.

Together with 24281987, 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 (24281987) 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 as a sum of consecutive naturals, namely, 12140994 + 12140995.

It is an arithmetic number, because the mean of its divisors is an integer number (12140995).

Almost surely, 2^24281989 is an apocalyptic number.

It is an amenable number.

24281989 is a deficient number, since it is larger than the sum of its proper divisors (1).

24281989 is an equidigital number, since it uses as much as digits as its factorization.

24281989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 43.

The square root of 24281989 is about 4927.6758213178. The cubic root of 24281989 is about 289.5752362566.

The spelling of 24281989 in words is "twenty-four million, two hundred eighty-one thousand, nine hundred eighty-nine".