47817913687 has 4 divisors (see below), whose sum is σ = 47818604896. Its totient is φ = 47817222480.

The previous prime is 47817913673. The next prime is 47817913747. The reversal of 47817913687 is 78631971874.

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

It is a cyclic number.

It is not a de Polignac number, because 47817913687 - 2¹¹ = 47817911639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47817913987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228639 + ... + 384592.

It is an arithmetic number, because the mean of its divisors is an integer number (11954651224).

Almost surely, 2^47817913687 is an apocalyptic number.

47817913687 is a deficient number, since it is larger than the sum of its proper divisors (691209).

47817913687 is an equidigital number, since it uses as much as digits as its factorization.

47817913687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691208.

The product of its digits is 14224896, while the sum is 61.

The spelling of 47817913687 in words is "forty-seven billion, eight hundred seventeen million, nine hundred thirteen thousand, six hundred eighty-seven".