47639527897 has 4 divisors (see below), whose sum is σ = 51304106980. Its totient is φ = 43974948816.

The previous prime is 47639527891. The next prime is 47639527913. The reversal of 47639527897 is 79872593674.

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 29246472256 + 18393055641 = 171016^2 + 135621^2 .

It is a cyclic number.

It is not a de Polignac number, because 47639527897 - 2⁷ = 47639527769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47639527891) 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, 1832289522 + ... + 1832289547.

It is an arithmetic number, because the mean of its divisors is an integer number (12826026745).

Almost surely, 2^47639527897 is an apocalyptic number.

It is an amenable number.

47639527897 is a deficient number, since it is larger than the sum of its proper divisors (3664579083).

47639527897 is a wasteful number, since it uses less digits than its factorization.

47639527897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3664579082.

The product of its digits is 160030080, while the sum is 67.

The spelling of 47639527897 in words is "forty-seven billion, six hundred thirty-nine million, five hundred twenty-seven thousand, eight hundred ninety-seven".