85089309 has 16 divisors (see below), whose sum is σ = 116499264. Its totient is φ = 55209600.

The previous prime is 85089299. The next prime is 85089331. The reversal of 85089309 is 90398058.

It is not a de Polignac number, because 85089309 - 2⁴ = 85089293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85089349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99327 + ... + 100179.

It is an arithmetic number, because the mean of its divisors is an integer number (7281204).

Almost surely, 2^85089309 is an apocalyptic number.

It is an amenable number.

85089309 is a deficient number, since it is larger than the sum of its proper divisors (31409955).

85089309 is a wasteful number, since it uses less digits than its factorization.

85089309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 85089309 is about 9224.3866462763. The cubic root of 85089309 is about 439.8369040840.

The spelling of 85089309 in words is "eighty-five million, eighty-nine thousand, three hundred nine".