85308109 has 4 divisors (see below), whose sum is σ = 85819104. Its totient is φ = 84797116.

The previous prime is 85308103. The next prime is 85308137. The reversal of 85308109 is 90180358.

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: 90180358 = 2 ⋅45090179.

It is a cyclic number.

It is not a de Polignac number, because 85308109 - 2³ = 85308101 is a prime.

It is a super-2 number, since 2×85308109² = 14554946922311762, which contains 22 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 (85308101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255247 + ... + 255580.

It is an arithmetic number, because the mean of its divisors is an integer number (21454776).

Almost surely, 2^85308109 is an apocalyptic number.

It is an amenable number.

85308109 is a deficient number, since it is larger than the sum of its proper divisors (510995).

85308109 is a wasteful number, since it uses less digits than its factorization.

85308109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510994.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 85308109 is about 9236.2388990324. The cubic root of 85308109 is about 440.2135826018.

The spelling of 85308109 in words is "eighty-five million, three hundred eight thousand, one hundred nine".