23091643 has 2 divisors, whose sum is σ = 23091644. Its totient is φ = 23091642.

The previous prime is 23091599. The next prime is 23091647. The reversal of 23091643 is 34619032.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23091643 - 2¹⁷ = 22960571 is a prime.

It is not a weakly prime, because it can be changed into another prime (23091647) 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, 11545821 + 11545822.

It is an arithmetic number, because the mean of its divisors is an integer number (11545822).

Almost surely, 2^23091643 is an apocalyptic number.

23091643 is a deficient number, since it is larger than the sum of its proper divisors (1).

23091643 is an equidigital number, since it uses as much as digits as its factorization.

23091643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 23091643 is about 4805.3764680824. The cubic root of 23091643 is about 284.7639083044.

The spelling of 23091643 in words is "twenty-three million, ninety-one thousand, six hundred forty-three".