85452009 has 16 divisors (see below), whose sum is σ = 119366400. Its totient is φ = 54302976.

The previous prime is 85451963. The next prime is 85452011. The reversal of 85452009 is 90025458.

It is not a de Polignac number, because 85452009 - 2⁷ = 85451881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85452109) 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, 657 + ... + 13089.

It is an arithmetic number, because the mean of its divisors is an integer number (7460400).

Almost surely, 2^85452009 is an apocalyptic number.

It is an amenable number.

85452009 is a deficient number, since it is larger than the sum of its proper divisors (33914391).

85452009 is a wasteful number, since it uses less digits than its factorization.

85452009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12544.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 85452009 is about 9244.0255841273. The cubic root of 85452009 is about 440.4609649054.

The spelling of 85452009 in words is "eighty-five million, four hundred fifty-two thousand, nine".