23784149 has 2 divisors, whose sum is σ = 23784150. Its totient is φ = 23784148.

The previous prime is 23784133. The next prime is 23784217. The reversal of 23784149 is 94148732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15547249 + 8236900 = 3943^2 + 2870^2 .

It is a cyclic number.

It is not a de Polignac number, because 23784149 - 2⁴ = 23784133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23784119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11892074 + 11892075.

It is an arithmetic number, because the mean of its divisors is an integer number (11892075).

Almost surely, 2^23784149 is an apocalyptic number.

It is an amenable number.

23784149 is a deficient number, since it is larger than the sum of its proper divisors (1).

23784149 is an equidigital number, since it uses as much as digits as its factorization.

23784149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 23784149 is about 4876.8995273637. The cubic root of 23784149 is about 287.5825557499.

The spelling of 23784149 in words is "twenty-three million, seven hundred eighty-four thousand, one hundred forty-nine".