858073081 has 2 divisors, whose sum is σ = 858073082. Its totient is φ = 858073080.

The previous prime is 858073043. The next prime is 858073091. The reversal of 858073081 is 180370858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487703056 + 370370025 = 22084^2 + 19245^2 .

It is a cyclic number.

It is not a de Polignac number, because 858073081 - 2²⁹ = 321202169 is a prime.

It is a super-2 number, since 2×858073081² = 1472578824673665122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (858073091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429036540 + 429036541.

It is an arithmetic number, because the mean of its divisors is an integer number (429036541).

Almost surely, 2^858073081 is an apocalyptic number.

It is an amenable number.

858073081 is a deficient number, since it is larger than the sum of its proper divisors (1).

858073081 is an equidigital number, since it uses as much as digits as its factorization.

858073081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 858073081 is about 29292.8844772924. The cubic root of 858073081 is about 950.2577623730.

It can be divided in two parts, 85807 and 3081, that added together give a palindrome (88888).

The spelling of 858073081 in words is "eight hundred fifty-eight million, seventy-three thousand, eighty-one".