194938210123 has 2 divisors, whose sum is σ = 194938210124. Its totient is φ = 194938210122.

The previous prime is 194938210111. The next prime is 194938210133. The reversal of 194938210123 is 321012839491.

194938210123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194938210123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194938210123.

It is not a weakly prime, because it can be changed into another prime (194938210133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97469105061 + 97469105062.

It is an arithmetic number, because the mean of its divisors is an integer number (97469105062).

Almost surely, 2^194938210123 is an apocalyptic number.

194938210123 is a deficient number, since it is larger than the sum of its proper divisors (1).

194938210123 is an equidigital number, since it uses as much as digits as its factorization.

194938210123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 194938210123 in words is "one hundred ninety-four billion, nine hundred thirty-eight million, two hundred ten thousand, one hundred twenty-three".