85495209 has 32 divisors (see below), whose sum is σ = 124637184. Its totient is φ = 51976320.

The previous prime is 85495183. The next prime is 85495211. The reversal of 85495209 is 90259458.

It is not a de Polignac number, because 85495209 - 2²¹ = 83398057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85495279) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132642 + ... + 133284.

It is an arithmetic number, because the mean of its divisors is an integer number (3894912).

Almost surely, 2^85495209 is an apocalyptic number.

It is an amenable number.

85495209 is a deficient number, since it is larger than the sum of its proper divisors (39141975).

85495209 is a wasteful number, since it uses less digits than its factorization.

85495209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 85495209 is about 9246.3619332146. The cubic root of 85495209 is about 440.5351769624.

The spelling of 85495209 in words is "eighty-five million, four hundred ninety-five thousand, two hundred nine".