69984389 has 2 divisors, whose sum is σ = 69984390. Its totient is φ = 69984388.

The previous prime is 69984373. The next prime is 69984401. The reversal of 69984389 is 98348996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64272289 + 5712100 = 8017^2 + 2390^2 .

It is a cyclic number.

It is not a de Polignac number, because 69984389 - 2⁴ = 69984373 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 (69984319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34992194 + 34992195.

It is an arithmetic number, because the mean of its divisors is an integer number (34992195).

Almost surely, 2^69984389 is an apocalyptic number.

It is an amenable number.

69984389 is a deficient number, since it is larger than the sum of its proper divisors (1).

69984389 is an equidigital number, since it uses as much as digits as its factorization.

69984389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 56.

The square root of 69984389 is about 8365.6672776294. The cubic root of 69984389 is about 412.0978908532.

The spelling of 69984389 in words is "sixty-nine million, nine hundred eighty-four thousand, three hundred eighty-nine".