85503409 has 8 divisors (see below), whose sum is σ = 87984288. Its totient is φ = 83041440.

The previous prime is 85503403. The next prime is 85503413. The reversal of 85503409 is 90430558.

85503409 = 772² + 773² + ... + 894².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85503409 - 2⁵ = 85503377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85503403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4714 + ... + 13900.

It is an arithmetic number, because the mean of its divisors is an integer number (10998036).

Almost surely, 2^85503409 is an apocalyptic number.

It is an amenable number.

85503409 is a deficient number, since it is larger than the sum of its proper divisors (2480879).

85503409 is a wasteful number, since it uses less digits than its factorization.

85503409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9455.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 85503409 is about 9246.8053402243. The cubic root of 85503409 is about 440.5492606871.

The spelling of 85503409 in words is "eighty-five million, five hundred three thousand, four hundred nine".