84500001 has 12 divisors (see below), whose sum is σ = 122261412. Its totient is φ = 56238336.

The previous prime is 84499991. The next prime is 84500021. The reversal of 84500001 is 10000548.

It can be written as a sum of positive squares in 2 ways, for example, as 33005025 + 51494976 = 5745^2 + 7176^2 .

It is not a de Polignac number, because 84500001 - 2⁵ = 84499969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84500021) 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 11 ways as a sum of consecutive naturals, for example, 2056 + ... + 13161.

It is an arithmetic number, because the mean of its divisors is an integer number (10188451).

Almost surely, 2^84500001 is an apocalyptic number.

It is an amenable number.

84500001 is a deficient number, since it is larger than the sum of its proper divisors (37761411).

84500001 is a wasteful number, since it uses less digits than its factorization.

84500001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15840 (or 15837 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 84500001 is about 9192.3882098179. The cubic root of 84500001 is about 438.8191494975.

Adding to 84500001 its reverse (10000548), we get a palindrome (94500549).

The spelling of 84500001 in words is "eighty-four million, five hundred thousand, one".