858984923 has 2 divisors, whose sum is σ = 858984924. Its totient is φ = 858984922.

The previous prime is 858984883. The next prime is 858984943. The reversal of 858984923 is 329489858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 858984923 - 2²⁰ = 857936347 is a prime.

It is not a weakly prime, because it can be changed into another prime (858984943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429492461 + 429492462.

It is an arithmetic number, because the mean of its divisors is an integer number (429492462).

Almost surely, 2^858984923 is an apocalyptic number.

858984923 is a deficient number, since it is larger than the sum of its proper divisors (1).

858984923 is an equidigital number, since it uses as much as digits as its factorization.

858984923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 56.

The square root of 858984923 is about 29308.4445680763. Note that the first 3 decimals coincide. The cubic root of 858984923 is about 950.5942442771.

The spelling of 858984923 in words is "eight hundred fifty-eight million, nine hundred eighty-four thousand, nine hundred twenty-three".