85843309 has 4 divisors (see below), whose sum is σ = 88612480. Its totient is φ = 83074140.

The previous prime is 85843267. The next prime is 85843321. The reversal of 85843309 is 90334858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90334858 = 2 ⋅45167429.

It is a cyclic number.

It is not a de Polignac number, because 85843309 - 2¹³ = 85835117 is a prime.

It is a super-3 number, since 3×85843309³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85843369) 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 in 3 ways as a sum of consecutive naturals, for example, 1384539 + ... + 1384600.

It is an arithmetic number, because the mean of its divisors is an integer number (22153120).

Almost surely, 2^85843309 is an apocalyptic number.

It is an amenable number.

85843309 is a deficient number, since it is larger than the sum of its proper divisors (2769171).

85843309 is a wasteful number, since it uses less digits than its factorization.

85843309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769170.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 85843309 is about 9265.1664313168. The cubic root of 85843309 is about 441.1322577452.

The spelling of 85843309 in words is "eighty-five million, eight hundred forty-three thousand, three hundred nine".