858109319 has 2 divisors, whose sum is σ = 858109320. Its totient is φ = 858109318.

The previous prime is 858109283. The next prime is 858109423. The reversal of 858109319 is 913901858.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-858109319 is a prime.

It is a super-2 number, since 2×858109319² = 1472703206709287522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 858109319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (858109019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429054659 + 429054660.

It is an arithmetic number, because the mean of its divisors is an integer number (429054660).

Almost surely, 2^858109319 is an apocalyptic number.

858109319 is a deficient number, since it is larger than the sum of its proper divisors (1).

858109319 is an equidigital number, since it uses as much as digits as its factorization.

858109319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 858109319 is about 29293.5030168807. The cubic root of 858109319 is about 950.2711392274.

The spelling of 858109319 in words is "eight hundred fifty-eight million, one hundred nine thousand, three hundred nineteen".