194100869 has 2 divisors, whose sum is σ = 194100870. Its totient is φ = 194100868.

The previous prime is 194100833. The next prime is 194100871. The reversal of 194100869 is 968001491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192376900 + 1723969 = 13870^2 + 1313^2 .

It is a cyclic number.

It is not a de Polignac number, because 194100869 - 2¹⁶ = 194035333 is a prime.

It is a super-2 number, since 2×194100869² = 75350294693110322, which contains 22 as substring.

Together with 194100871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194102869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97050434 + 97050435.

It is an arithmetic number, because the mean of its divisors is an integer number (97050435).

Almost surely, 2^194100869 is an apocalyptic number.

It is an amenable number.

194100869 is a deficient number, since it is larger than the sum of its proper divisors (1).

194100869 is an equidigital number, since it uses as much as digits as its factorization.

194100869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 194100869 is about 13932.0087927047. The cubic root of 194100869 is about 578.9963508609.

The spelling of 194100869 in words is "one hundred ninety-four million, one hundred thousand, eight hundred sixty-nine".