47888981993 has 2 divisors, whose sum is σ = 47888981994. Its totient is φ = 47888981992.

The previous prime is 47888981989. The next prime is 47888982023. The reversal of 47888981993 is 39918988874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36895878889 + 10993103104 = 192083^2 + 104848^2 .

It is a cyclic number.

It is not a de Polignac number, because 47888981993 - 2² = 47888981989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47888981993.

It is not a weakly prime, because it can be changed into another prime (47888981593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23944490996 + 23944490997.

It is an arithmetic number, because the mean of its divisors is an integer number (23944490997).

Almost surely, 2^47888981993 is an apocalyptic number.

It is an amenable number.

47888981993 is a deficient number, since it is larger than the sum of its proper divisors (1).

47888981993 is an equidigital number, since it uses as much as digits as its factorization.

47888981993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250822656, while the sum is 74.

The spelling of 47888981993 in words is "forty-seven billion, eight hundred eighty-eight million, nine hundred eighty-one thousand, nine hundred ninety-three".