866204923 has 2 divisors, whose sum is σ = 866204924. Its totient is φ = 866204922.

The previous prime is 866204903. The next prime is 866204929. The reversal of 866204923 is 329402668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866204923 - 2²⁵ = 832650491 is a prime.

It is not a weakly prime, because it can be changed into another prime (866204929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433102461 + 433102462.

It is an arithmetic number, because the mean of its divisors is an integer number (433102462).

Almost surely, 2^866204923 is an apocalyptic number.

866204923 is a deficient number, since it is larger than the sum of its proper divisors (1).

866204923 is an equidigital number, since it uses as much as digits as its factorization.

866204923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 866204923 is about 29431.3595166788. The cubic root of 866204923 is about 953.2501506010.

The spelling of 866204923 in words is "eight hundred sixty-six million, two hundred four thousand, nine hundred twenty-three".