866149223 has 2 divisors, whose sum is σ = 866149224. Its totient is φ = 866149222.

The previous prime is 866149217. The next prime is 866149259. The reversal of 866149223 is 322941668.

866149223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866149223 - 2⁸ = 866148967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866149213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433074611 + 433074612.

It is an arithmetic number, because the mean of its divisors is an integer number (433074612).

Almost surely, 2^866149223 is an apocalyptic number.

866149223 is a deficient number, since it is larger than the sum of its proper divisors (1).

866149223 is an equidigital number, since it uses as much as digits as its factorization.

866149223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The square root of 866149223 is about 29430.4132318933. The cubic root of 866149223 is about 953.2297177257.

The spelling of 866149223 in words is "eight hundred sixty-six million, one hundred forty-nine thousand, two hundred twenty-three".