85509506 has 4 divisors (see below), whose sum is σ = 128264262. Its totient is φ = 42754752.

The previous prime is 85509491. The next prime is 85509517. The reversal of 85509506 is 60590558.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50993881 + 34515625 = 7141^2 + 5875^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 85509506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21377375 + ... + 21377378.

Almost surely, 2^85509506 is an apocalyptic number.

85509506 is a deficient number, since it is larger than the sum of its proper divisors (42754756).

85509506 is a wasteful number, since it uses less digits than its factorization.

85509506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42754755.

The product of its (nonzero) digits is 54000, while the sum is 38.

The square root of 85509506 is about 9247.1350157765. The cubic root of 85509506 is about 440.5597318680.

The spelling of 85509506 in words is "eighty-five million, five hundred nine thousand, five hundred six".