85000001 has 4 divisors (see below), whose sum is σ = 85218900. Its totient is φ = 84781104.

The previous prime is 84999979. The next prime is 85000007. The reversal of 85000001 is 10000058.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13512976 + 71487025 = 3676^2 + 8455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85000001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85000001.

It is not an unprimeable number, because it can be changed into a prime (85000007) 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 3 ways as a sum of consecutive naturals, for example, 108866 + ... + 109643.

It is an arithmetic number, because the mean of its divisors is an integer number (21304725).

Almost surely, 2^85000001 is an apocalyptic number.

It is an amenable number.

85000001 is a deficient number, since it is larger than the sum of its proper divisors (218899).

85000001 is a wasteful number, since it uses less digits than its factorization.

85000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218898.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 85000001 is about 9219.5445115255. The cubic root of 85000001 is about 439.6829689401.

Adding to 85000001 its reverse (10000058), we get a palindrome (95000059).

The spelling of 85000001 in words is "eighty-five million, one", and thus it is an aban number and an uban number.