24783989 has 2 divisors, whose sum is σ = 24783990. Its totient is φ = 24783988.

The previous prime is 24783971. The next prime is 24784003. The reversal of 24783989 is 98938742.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23716900 + 1067089 = 4870^2 + 1033^2 .

It is a cyclic number.

It is not a de Polignac number, because 24783989 - 2¹² = 24779893 is a prime.

It is a super-2 number, since 2×24783989² = 1228492221504242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24783089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12391994 + 12391995.

It is an arithmetic number, because the mean of its divisors is an integer number (12391995).

Almost surely, 2^24783989 is an apocalyptic number.

It is an amenable number.

24783989 is a deficient number, since it is larger than the sum of its proper divisors (1).

24783989 is an equidigital number, since it uses as much as digits as its factorization.

24783989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The square root of 24783989 is about 4978.3520365679. The cubic root of 24783989 is about 291.5571765721.

The spelling of 24783989 in words is "twenty-four million, seven hundred eighty-three thousand, nine hundred eighty-nine".