865761223 has 2 divisors, whose sum is σ = 865761224. Its totient is φ = 865761222.

The previous prime is 865761199. The next prime is 865761251. The reversal of 865761223 is 322167568.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 865761223 - 2⁹ = 865760711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865161223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432880611 + 432880612.

It is an arithmetic number, because the mean of its divisors is an integer number (432880612).

Almost surely, 2^865761223 is an apocalyptic number.

865761223 is a deficient number, since it is larger than the sum of its proper divisors (1).

865761223 is an equidigital number, since it uses as much as digits as its factorization.

865761223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 865761223 is about 29423.8206730533. The cubic root of 865761223 is about 953.0873602809.

The spelling of 865761223 in words is "eight hundred sixty-five million, seven hundred sixty-one thousand, two hundred twenty-three".