4219666397 has 2 divisors, whose sum is σ = 4219666398. Its totient is φ = 4219666396.

The previous prime is 4219666379. The next prime is 4219666427. The reversal of 4219666397 is 7936669124.

Together with previous prime (4219666379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3234083161 + 985583236 = 56869^2 + 31394^2 .

It is a cyclic number.

It is not a de Polignac number, because 4219666397 - 2⁶ = 4219666333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4219666307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109833198 + 2109833199.

It is an arithmetic number, because the mean of its divisors is an integer number (2109833199).

Almost surely, 2^4219666397 is an apocalyptic number.

It is an amenable number.

4219666397 is a deficient number, since it is larger than the sum of its proper divisors (1).

4219666397 is an equidigital number, since it uses as much as digits as its factorization.

4219666397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 53.

The square root of 4219666397 is about 64958.9593281789. The cubic root of 4219666397 is about 1615.9430056454.

The spelling of 4219666397 in words is "four billion, two hundred nineteen million, six hundred sixty-six thousand, three hundred ninety-seven".