194605129 has 2 divisors, whose sum is σ = 194605130. Its totient is φ = 194605128.

The previous prime is 194605123. The next prime is 194605153. The reversal of 194605129 is 921506491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159971904 + 34633225 = 12648^2 + 5885^2 .

It is an emirp because it is prime and its reverse (921506491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194605129 - 2¹⁹ = 194080841 is a prime.

It is equal to p_10796761 and since 194605129 and 10796761 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (194605123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97302564 + 97302565.

It is an arithmetic number, because the mean of its divisors is an integer number (97302565).

Almost surely, 2^194605129 is an apocalyptic number.

It is an amenable number.

194605129 is a deficient number, since it is larger than the sum of its proper divisors (1).

194605129 is an equidigital number, since it uses as much as digits as its factorization.

194605129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 194605129 is about 13950.0942290724. The cubic root of 194605129 is about 579.4973141509.

The spelling of 194605129 in words is "one hundred ninety-four million, six hundred five thousand, one hundred twenty-nine".