24723989 has 2 divisors, whose sum is σ = 24723990. Its totient is φ = 24723988.

The previous prime is 24723983. The next prime is 24723991. The reversal of 24723989 is 98932742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24671089 + 52900 = 4967^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 24723989 - 2⁴ = 24723973 is a prime.

It is a super-2 number, since 2×24723989² = 1222551264144242, which contains 22 as substring.

Together with 24723991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24723983) 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, 12361994 + 12361995.

It is an arithmetic number, because the mean of its divisors is an integer number (12361995).

Almost surely, 2^24723989 is an apocalyptic number.

It is an amenable number.

24723989 is a deficient number, since it is larger than the sum of its proper divisors (1).

24723989 is an equidigital number, since it uses as much as digits as its factorization.

24723989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 24723989 is about 4972.3222944616. The cubic root of 24723989 is about 291.3217078006.

The spelling of 24723989 in words is "twenty-four million, seven hundred twenty-three thousand, nine hundred eighty-nine".