23784989 has 6 divisors (see below), whose sum is σ = 25266714. Its totient is φ = 22385600.

The previous prime is 23784973. The next prime is 23784997. The reversal of 23784989 is 98948732.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 11764900 + 12020089 = 3430^2 + 3467^2 .

It is not a de Polignac number, because 23784989 - 2⁴ = 23784973 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 (23784949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40862 + ... + 41439.

It is an arithmetic number, because the mean of its divisors is an integer number (4211119).

Almost surely, 2^23784989 is an apocalyptic number.

It is an amenable number.

23784989 is a deficient number, since it is larger than the sum of its proper divisors (1481725).

23784989 is an equidigital number, since it uses as much as digits as its factorization.

23784989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82335 (or 82318 counting only the distinct ones).

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

The square root of 23784989 is about 4876.9856468930. The cubic root of 23784989 is about 287.5859412891.

The spelling of 23784989 in words is "twenty-three million, seven hundred eighty-four thousand, nine hundred eighty-nine".