194223938563 has 2 divisors, whose sum is σ = 194223938564. Its totient is φ = 194223938562.

The previous prime is 194223938527. The next prime is 194223938581. The reversal of 194223938563 is 365839322491.

It is a strong prime.

It is an emirp because it is prime and its reverse (365839322491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194223938563 - 2³⁷ = 56784985091 is a prime.

It is not a weakly prime, because it can be changed into another prime (194223938663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97111969281 + 97111969282.

It is an arithmetic number, because the mean of its divisors is an integer number (97111969282).

Almost surely, 2^194223938563 is an apocalyptic number.

194223938563 is a deficient number, since it is larger than the sum of its proper divisors (1).

194223938563 is an equidigital number, since it uses as much as digits as its factorization.

194223938563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 55.

The spelling of 194223938563 in words is "one hundred ninety-four billion, two hundred twenty-three million, nine hundred thirty-eight thousand, five hundred sixty-three".