23288921 has 2 divisors, whose sum is σ = 23288922. Its totient is φ = 23288920.

The previous prime is 23288917. The next prime is 23288957. The reversal of 23288921 is 12988232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22705225 + 583696 = 4765^2 + 764^2 .

It is a cyclic number.

It is not a de Polignac number, because 23288921 - 2² = 23288917 is a prime.

It is not a weakly prime, because it can be changed into another prime (23288911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11644460 + 11644461.

It is an arithmetic number, because the mean of its divisors is an integer number (11644461).

Almost surely, 2^23288921 is an apocalyptic number.

It is an amenable number.

23288921 is a deficient number, since it is larger than the sum of its proper divisors (1).

23288921 is an equidigital number, since it uses as much as digits as its factorization.

23288921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 23288921 is about 4825.8596125457. The cubic root of 23288921 is about 285.5725475905.

The spelling of 23288921 in words is "twenty-three million, two hundred eighty-eight thousand, nine hundred twenty-one".