23728109 has 2 divisors, whose sum is σ = 23728110. Its totient is φ = 23728108.

The previous prime is 23728099. The next prime is 23728147. The reversal of 23728109 is 90182732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 10259209 = 3670^2 + 3203^2 .

It is a cyclic number.

It is not a de Polignac number, because 23728109 - 2²⁴ = 6950893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23728189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11864054 + 11864055.

It is an arithmetic number, because the mean of its divisors is an integer number (11864055).

Almost surely, 2^23728109 is an apocalyptic number.

It is an amenable number.

23728109 is a deficient number, since it is larger than the sum of its proper divisors (1).

23728109 is an equidigital number, since it uses as much as digits as its factorization.

23728109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 23728109 is about 4871.1506854130. The cubic root of 23728109 is about 287.3565116371.

The spelling of 23728109 in words is "twenty-three million, seven hundred twenty-eight thousand, one hundred nine".