47988218909 has 2 divisors, whose sum is σ = 47988218910. Its totient is φ = 47988218908.

The previous prime is 47988218869. The next prime is 47988218933. The reversal of 47988218909 is 90981288974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39701758009 + 8286460900 = 199253^2 + 91030^2 .

It is a cyclic number.

It is not a de Polignac number, because 47988218909 - 2²⁰ = 47987170333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47988218989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23994109454 + 23994109455.

It is an arithmetic number, because the mean of its divisors is an integer number (23994109455).

Almost surely, 2^47988218909 is an apocalyptic number.

It is an amenable number.

47988218909 is a deficient number, since it is larger than the sum of its proper divisors (1).

47988218909 is an equidigital number, since it uses as much as digits as its factorization.

47988218909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20901888, while the sum is 65.

The spelling of 47988218909 in words is "forty-seven billion, nine hundred eighty-eight million, two hundred eighteen thousand, nine hundred nine".