24197989 has 4 divisors (see below), whose sum is σ = 24253056. Its totient is φ = 24142924.

The previous prime is 24197983. The next prime is 24197993. The reversal of 24197989 is 98979142.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24197989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24197983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26869 + ... + 27754.

It is an arithmetic number, because the mean of its divisors is an integer number (6063264).

Almost surely, 2^24197989 is an apocalyptic number.

It is an amenable number.

24197989 is a deficient number, since it is larger than the sum of its proper divisors (55067).

24197989 is an equidigital number, since it uses as much as digits as its factorization.

24197989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55066.

The product of its digits is 326592, while the sum is 49.

The square root of 24197989 is about 4919.1451493120. The cubic root of 24197989 is about 289.2409360381.

The spelling of 24197989 in words is "twenty-four million, one hundred ninety-seven thousand, nine hundred eighty-nine".