23021393 has 2 divisors, whose sum is σ = 23021394. Its totient is φ = 23021392.

The previous prime is 23021359. The next prime is 23021423. The reversal of 23021393 is 39312032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11785489 + 11235904 = 3433^2 + 3352^2 .

It is a cyclic number.

It is not a de Polignac number, because 23021393 - 2¹⁸ = 22759249 is a prime.

It is not a weakly prime, because it can be changed into another prime (23021333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11510696 + 11510697.

It is an arithmetic number, because the mean of its divisors is an integer number (11510697).

Almost surely, 2^23021393 is an apocalyptic number.

It is an amenable number.

23021393 is a deficient number, since it is larger than the sum of its proper divisors (1).

23021393 is an equidigital number, since it uses as much as digits as its factorization.

23021393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 23021393 is about 4798.0613793490. The cubic root of 23021393 is about 284.4748429031.

The spelling of 23021393 in words is "twenty-three million, twenty-one thousand, three hundred ninety-three".