194038244513 has 2 divisors, whose sum is σ = 194038244514. Its totient is φ = 194038244512.

The previous prime is 194038244399. The next prime is 194038244531. The reversal of 194038244513 is 315442830491.

Together with next prime (194038244531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178347425344 + 15690819169 = 422312^2 + 125263^2 .

It is a cyclic number.

It is not a de Polignac number, because 194038244513 - 2³⁴ = 176858375329 is a prime.

It is not a weakly prime, because it can be changed into another prime (194038244563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97019122256 + 97019122257.

It is an arithmetic number, because the mean of its divisors is an integer number (97019122257).

Almost surely, 2^194038244513 is an apocalyptic number.

It is an amenable number.

194038244513 is a deficient number, since it is larger than the sum of its proper divisors (1).

194038244513 is an equidigital number, since it uses as much as digits as its factorization.

194038244513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 194038244513 in words is "one hundred ninety-four billion, thirty-eight million, two hundred forty-four thousand, five hundred thirteen".