219404897 has 2 divisors, whose sum is σ = 219404898. Its totient is φ = 219404896.

The previous prime is 219404881. The next prime is 219404971. The reversal of 219404897 is 798404912.

219404897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146797456 + 72607441 = 12116^2 + 8521^2 .

It is a cyclic number.

It is not a de Polignac number, because 219404897 - 2⁴ = 219404881 is a prime.

It is not a weakly prime, because it can be changed into another prime (219404197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109702448 + 109702449.

It is an arithmetic number, because the mean of its divisors is an integer number (109702449).

Almost surely, 2^219404897 is an apocalyptic number.

It is an amenable number.

219404897 is a deficient number, since it is larger than the sum of its proper divisors (1).

219404897 is an equidigital number, since it uses as much as digits as its factorization.

219404897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 219404897 is about 14812.3224715100. The cubic root of 219404897 is about 603.1362602961.

The spelling of 219404897 in words is "two hundred nineteen million, four hundred four thousand, eight hundred ninety-seven".