24897989 has 4 divisors (see below), whose sum is σ = 25477056. Its totient is φ = 24318924.

The previous prime is 24897973. The next prime is 24898021. The reversal of 24897989 is 98979842.

It is a happy number.

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 not a de Polignac number, because 24897989 - 2⁴ = 24897973 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 (24897949) 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, 289469 + ... + 289554.

It is an arithmetic number, because the mean of its divisors is an integer number (6369264).

Almost surely, 2^24897989 is an apocalyptic number.

It is an amenable number.

24897989 is a deficient number, since it is larger than the sum of its proper divisors (579067).

24897989 is an equidigital number, since it uses as much as digits as its factorization.

24897989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579066.

The product of its digits is 2612736, while the sum is 56.

The square root of 24897989 is about 4989.7884724706. The cubic root of 24897989 is about 292.0035223507.

The spelling of 24897989 in words is "twenty-four million, eight hundred ninety-seven thousand, nine hundred eighty-nine".