23187089 has 2 divisors, whose sum is σ = 23187090. Its totient is φ = 23187088.

The previous prime is 23187077. The next prime is 23187103. The reversal of 23187089 is 98078132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23116864 + 70225 = 4808^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 23187089 - 2⁸ = 23186833 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23187029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11593544 + 11593545.

It is an arithmetic number, because the mean of its divisors is an integer number (11593545).

Almost surely, 2^23187089 is an apocalyptic number.

It is an amenable number.

23187089 is a deficient number, since it is larger than the sum of its proper divisors (1).

23187089 is an equidigital number, since it uses as much as digits as its factorization.

23187089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 23187089 is about 4815.2973947618. The cubic root of 23187089 is about 285.1557125907.

The spelling of 23187089 in words is "twenty-three million, one hundred eighty-seven thousand, eighty-nine".