196918129 has 2 divisors, whose sum is σ = 196918130. Its totient is φ = 196918128.

The previous prime is 196918061. The next prime is 196918151. The reversal of 196918129 is 921819691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168402529 + 28515600 = 12977^2 + 5340^2 .

It is a cyclic number.

It is not a de Polignac number, because 196918129 - 2¹⁵ = 196885361 is a prime.

It is not a weakly prime, because it can be changed into another prime (196918229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98459064 + 98459065.

It is an arithmetic number, because the mean of its divisors is an integer number (98459065).

Almost surely, 2^196918129 is an apocalyptic number.

It is an amenable number.

196918129 is a deficient number, since it is larger than the sum of its proper divisors (1).

196918129 is an equidigital number, since it uses as much as digits as its factorization.

196918129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 46.

The square root of 196918129 is about 14032.7520109207. The cubic root of 196918129 is about 581.7841700784.

The spelling of 196918129 in words is "one hundred ninety-six million, nine hundred eighteen thousand, one hundred twenty-nine".