24786989 has 2 divisors, whose sum is σ = 24786990. Its totient is φ = 24786988.

The previous prime is 24786977. The next prime is 24786991. The reversal of 24786989 is 98968742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13564489 + 11222500 = 3683^2 + 3350^2 .

It is a cyclic number.

It is not a de Polignac number, because 24786989 - 2⁸ = 24786733 is a prime.

It is a super-2 number, since 2×24786989² = 1228789647372242, which contains 22 as substring.

Together with 24786991, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 24786989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24783989) 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, 12393494 + 12393495.

It is an arithmetic number, because the mean of its divisors is an integer number (12393495).

Almost surely, 2^24786989 is an apocalyptic number.

It is an amenable number.

24786989 is a deficient number, since it is larger than the sum of its proper divisors (1).

24786989 is an equidigital number, since it uses as much as digits as its factorization.

24786989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 53.

The square root of 24786989 is about 4978.6533319764. The cubic root of 24786989 is about 291.5689400301.

The spelling of 24786989 in words is "twenty-four million, seven hundred eighty-six thousand, nine hundred eighty-nine".