1988216143 has 2 divisors, whose sum is σ = 1988216144. Its totient is φ = 1988216142.

The previous prime is 1988216077. The next prime is 1988216149. The reversal of 1988216143 is 3416128891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1988216143 - 2¹³ = 1988207951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1988216143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1988216149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994108071 + 994108072.

It is an arithmetic number, because the mean of its divisors is an integer number (994108072).

Almost surely, 2^1988216143 is an apocalyptic number.

1988216143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988216143 is an equidigital number, since it uses as much as digits as its factorization.

1988216143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 43.

The square root of 1988216143 is about 44589.4173879857. The cubic root of 1988216143 is about 1257.4417192403.

The spelling of 1988216143 in words is "one billion, nine hundred eighty-eight million, two hundred sixteen thousand, one hundred forty-three".