1984164289 has 2 divisors, whose sum is σ = 1984164290. Its totient is φ = 1984164288.

The previous prime is 1984164283. The next prime is 1984164341. The reversal of 1984164289 is 9824614891.

It is an a-pointer prime, because the next prime (1984164341) can be obtained adding 1984164289 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1902442689 + 81721600 = 43617^2 + 9040^2 .

It is a cyclic number.

It is not a de Polignac number, because 1984164289 - 2¹⁵ = 1984131521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1984164283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992082144 + 992082145.

It is an arithmetic number, because the mean of its divisors is an integer number (992082145).

Almost surely, 2^1984164289 is an apocalyptic number.

It is an amenable number.

1984164289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984164289 is an equidigital number, since it uses as much as digits as its factorization.

1984164289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 52.

The square root of 1984164289 is about 44543.9590629302. The cubic root of 1984164289 is about 1256.5869437550.

The spelling of 1984164289 in words is "one billion, nine hundred eighty-four million, one hundred sixty-four thousand, two hundred eighty-nine".