219842897 has 2 divisors, whose sum is σ = 219842898. Its totient is φ = 219842896.

The previous prime is 219842873. The next prime is 219842899. The reversal of 219842897 is 798248912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159997201 + 59845696 = 12649^2 + 7736^2 .

It is a cyclic number.

It is not a de Polignac number, because 219842897 - 2¹⁰ = 219841873 is a prime.

It is a super-2 number, since 2×219842897² = 96661798722705218, which contains 22 as substring.

Together with 219842899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (219842899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109921448 + 109921449.

It is an arithmetic number, because the mean of its divisors is an integer number (109921449).

Almost surely, 2^219842897 is an apocalyptic number.

It is an amenable number.

219842897 is a deficient number, since it is larger than the sum of its proper divisors (1).

219842897 is an equidigital number, since it uses as much as digits as its factorization.

219842897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 219842897 is about 14827.1000873401. The cubic root of 219842897 is about 603.5373423284.

The spelling of 219842897 in words is "two hundred nineteen million, eight hundred forty-two thousand, eight hundred ninety-seven".