219488117 has 2 divisors, whose sum is σ = 219488118. Its totient is φ = 219488116.

The previous prime is 219488081. The next prime is 219488119. The reversal of 219488117 is 711884912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218862436 + 625681 = 14794^2 + 791^2 .

It is a cyclic number.

It is not a de Polignac number, because 219488117 - 2⁶ = 219488053 is a prime.

Together with 219488119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219488119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109744058 + 109744059.

It is an arithmetic number, because the mean of its divisors is an integer number (109744059).

Almost surely, 2^219488117 is an apocalyptic number.

It is an amenable number.

219488117 is a deficient number, since it is larger than the sum of its proper divisors (1).

219488117 is an equidigital number, since it uses as much as digits as its factorization.

219488117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 41.

The square root of 219488117 is about 14815.1313527758. The cubic root of 219488117 is about 603.2125069304.

The spelling of 219488117 in words is "two hundred nineteen million, four hundred eighty-eight thousand, one hundred seventeen".