219608069 has 2 divisors, whose sum is σ = 219608070. Its totient is φ = 219608068.

The previous prime is 219608063. The next prime is 219608083. The reversal of 219608069 is 960806912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147136900 + 72471169 = 12130^2 + 8513^2 .

It is a cyclic number.

It is not a de Polignac number, because 219608069 - 2²⁰ = 218559493 is a prime.

It is a super-2 number, since 2×219608069² = 96455407939817522, which contains 22 as substring.

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 (219608063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109804034 + 109804035.

It is an arithmetic number, because the mean of its divisors is an integer number (109804035).

Almost surely, 2^219608069 is an apocalyptic number.

It is an amenable number.

219608069 is a deficient number, since it is larger than the sum of its proper divisors (1).

219608069 is an equidigital number, since it uses as much as digits as its factorization.

219608069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 219608069 is about 14819.1790933236. The cubic root of 219608069 is about 603.3223737279.

The spelling of 219608069 in words is "two hundred nineteen million, six hundred eight thousand, sixty-nine".