85578747 has 4 divisors (see below), whose sum is σ = 114105000. Its totient is φ = 57052496.

The previous prime is 85578737. The next prime is 85578761. The reversal of 85578747 is 74787558.

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

It is a cyclic number.

It is not a de Polignac number, because 85578747 - 2¹⁴ = 85562363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85578747.

It is not an unprimeable number, because it can be changed into a prime (85578737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14263122 + ... + 14263127.

It is an arithmetic number, because the mean of its divisors is an integer number (28526250).

Almost surely, 2^85578747 is an apocalyptic number.

85578747 is a deficient number, since it is larger than the sum of its proper divisors (28526253).

85578747 is a wasteful number, since it uses less digits than its factorization.

85578747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28526252.

The product of its digits is 2195200, while the sum is 51.

The square root of 85578747 is about 9250.8781745302. The cubic root of 85578747 is about 440.6786136462.

It can be divided in two parts, 8 and 5578747, that added together give a palindrome (5578755).

The spelling of 85578747 in words is "eighty-five million, five hundred seventy-eight thousand, seven hundred forty-seven".