84947248649 has 4 divisors (see below), whose sum is σ = 85174989636. Its totient is φ = 84719507664.

The previous prime is 84947248583. The next prime is 84947248657. The reversal of 84947248649 is 94684274948.

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 62557513225 + 22389735424 = 250115^2 + 149632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84947248649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84947248669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113869934 + ... + 113870679.

It is an arithmetic number, because the mean of its divisors is an integer number (21293747409).

Almost surely, 2^84947248649 is an apocalyptic number.

It is an amenable number.

84947248649 is a deficient number, since it is larger than the sum of its proper divisors (227740987).

84947248649 is a wasteful number, since it uses less digits than its factorization.

84947248649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227740986.

The product of its digits is 111476736, while the sum is 65.

The spelling of 84947248649 in words is "eighty-four billion, nine hundred forty-seven million, two hundred forty-eight thousand, six hundred forty-nine".