85980909 has 32 divisors (see below), whose sum is σ = 139207680. Its totient is φ = 46109952.

The previous prime is 85980901. The next prime is 85980913. The reversal of 85980909 is 90908958.

It is not a de Polignac number, because 85980909 - 2³ = 85980901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85980901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44134 + ... + 46040.

It is an arithmetic number, because the mean of its divisors is an integer number (4350240).

Almost surely, 2^85980909 is an apocalyptic number.

It is an amenable number.

85980909 is a deficient number, since it is larger than the sum of its proper divisors (53226771).

85980909 is a wasteful number, since it uses less digits than its factorization.

85980909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049.

The product of its (nonzero) digits is 233280, while the sum is 48.

The square root of 85980909 is about 9272.5891206286. The cubic root of 85980909 is about 441.3678319012.

The spelling of 85980909 in words is "eighty-five million, nine hundred eighty thousand, nine hundred nine".