194976121 has 2 divisors, whose sum is σ = 194976122. Its totient is φ = 194976120.

The previous prime is 194976101. The next prime is 194976137. The reversal of 194976121 is 121679491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111070521 + 83905600 = 10539^2 + 9160^2 .

It is a cyclic number.

It is not a de Polignac number, because 194976121 - 2⁷ = 194975993 is a prime.

It is not a weakly prime, because it can be changed into another prime (194976101) 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, 97488060 + 97488061.

It is an arithmetic number, because the mean of its divisors is an integer number (97488061).

Almost surely, 2^194976121 is an apocalyptic number.

It is an amenable number.

194976121 is a deficient number, since it is larger than the sum of its proper divisors (1).

194976121 is an equidigital number, since it uses as much as digits as its factorization.

194976121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 194976121 is about 13963.3850122383. The cubic root of 194976121 is about 579.8653284236.

The spelling of 194976121 in words is "one hundred ninety-four million, nine hundred seventy-six thousand, one hundred twenty-one".