194166101 has 2 divisors, whose sum is σ = 194166102. Its totient is φ = 194166100.

The previous prime is 194166079. The next prime is 194166131. The reversal of 194166101 is 101661491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179158225 + 15007876 = 13385^2 + 3874^2 .

It is a cyclic number.

It is not a de Polignac number, because 194166101 - 2¹⁰ = 194165077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194166131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97083050 + 97083051.

It is an arithmetic number, because the mean of its divisors is an integer number (97083051).

Almost surely, 2^194166101 is an apocalyptic number.

It is an amenable number.

194166101 is a deficient number, since it is larger than the sum of its proper divisors (1).

194166101 is an equidigital number, since it uses as much as digits as its factorization.

194166101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 194166101 is about 13934.3496798380. The cubic root of 194166101 is about 579.0612052154.

The spelling of 194166101 in words is "one hundred ninety-four million, one hundred sixty-six thousand, one hundred one".