85354509 has 4 divisors (see below), whose sum is σ = 113806016. Its totient is φ = 56903004.

The previous prime is 85354487. The next prime is 85354531. The reversal of 85354509 is 90545358.

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.

It is an interprime number because it is at equal distance from previous prime (85354487) and next prime (85354531).

It is not a de Polignac number, because 85354509 - 2⁹ = 85353997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85354609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14225749 + ... + 14225754.

It is an arithmetic number, because the mean of its divisors is an integer number (28451504).

Almost surely, 2^85354509 is an apocalyptic number.

It is an amenable number.

85354509 is a deficient number, since it is larger than the sum of its proper divisors (28451507).

85354509 is a wasteful number, since it uses less digits than its factorization.

85354509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28451506.

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 85354509 is about 9238.7504025166. The cubic root of 85354509 is about 440.2933804401.

The spelling of 85354509 in words is "eighty-five million, three hundred fifty-four thousand, five hundred nine".