5447647897 has 4 divisors (see below), whose sum is σ = 5450334820. Its totient is φ = 5444960976.

The previous prime is 5447647831. The next prime is 5447647921. The reversal of 5447647897 is 7987467445.

5447647897 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7987467445 = 5 ⋅1597493489.

It can be written as a sum of positive squares in 2 ways, for example, as 5420493376 + 27154521 = 73624^2 + 5211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5447647897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5447647097) 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, 1340418 + ... + 1344475.

It is an arithmetic number, because the mean of its divisors is an integer number (1362583705).

Almost surely, 2^5447647897 is an apocalyptic number.

It is an amenable number.

5447647897 is a deficient number, since it is larger than the sum of its proper divisors (2686923).

5447647897 is a wasteful number, since it uses less digits than its factorization.

5447647897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686922.

The product of its digits is 47416320, while the sum is 61.

The square root of 5447647897 is about 73808.1831303278. The cubic root of 5447647897 is about 1759.5556618698. Note that the first 3 decimals are identical.

The spelling of 5447647897 in words is "five billion, four hundred forty-seven million, six hundred forty-seven thousand, eight hundred ninety-seven".