23266391 has 2 divisors, whose sum is σ = 23266392. Its totient is φ = 23266390.

The previous prime is 23266379. The next prime is 23266423. The reversal of 23266391 is 19366232.

It is an a-pointer prime, because the next prime (23266423) can be obtained adding 23266391 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23266391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23266351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11633195 + 11633196.

It is an arithmetic number, because the mean of its divisors is an integer number (11633196).

Almost surely, 2^23266391 is an apocalyptic number.

23266391 is a deficient number, since it is larger than the sum of its proper divisors (1).

23266391 is an equidigital number, since it uses as much as digits as its factorization.

23266391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 32.

The square root of 23266391 is about 4823.5247485630. The cubic root of 23266391 is about 285.4804290338.

The spelling of 23266391 in words is "twenty-three million, two hundred sixty-six thousand, three hundred ninety-one".