194937962189 has 2 divisors, whose sum is σ = 194937962190. Its totient is φ = 194937962188.

The previous prime is 194937962113. The next prime is 194937962251. The reversal of 194937962189 is 981269739491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188761574089 + 6176388100 = 434467^2 + 78590^2 .

It is a cyclic number.

It is not a de Polignac number, because 194937962189 - 2¹⁶ = 194937896653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194937962689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97468981094 + 97468981095.

It is an arithmetic number, because the mean of its divisors is an integer number (97468981095).

Almost surely, 2^194937962189 is an apocalyptic number.

It is an amenable number.

194937962189 is a deficient number, since it is larger than the sum of its proper divisors (1).

194937962189 is an equidigital number, since it uses as much as digits as its factorization.

194937962189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52907904, while the sum is 68.

The spelling of 194937962189 in words is "one hundred ninety-four billion, nine hundred thirty-seven million, nine hundred sixty-two thousand, one hundred eighty-nine".