858916819 has 2 divisors, whose sum is σ = 858916820. Its totient is φ = 858916818.

The previous prime is 858916811. The next prime is 858916829. The reversal of 858916819 is 918619858.

858916819 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 858916819 - 2³ = 858916811 is a prime.

It is a super-2 number, since 2×858916819² = 1475476203922157522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 858916819.

It is not a weakly prime, because it can be changed into another prime (858916811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429458409 + 429458410.

It is an arithmetic number, because the mean of its divisors is an integer number (429458410).

Almost surely, 2^858916819 is an apocalyptic number.

858916819 is a deficient number, since it is larger than the sum of its proper divisors (1).

858916819 is an equidigital number, since it uses as much as digits as its factorization.

858916819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 55.

The square root of 858916819 is about 29307.2826956032. The cubic root of 858916819 is about 950.5691212202.

The spelling of 858916819 in words is "eight hundred fifty-eight million, nine hundred sixteen thousand, eight hundred nineteen".