195936129 has 6 divisors (see below), whose sum is σ = 283018866. Its totient is φ = 130624080.

The previous prime is 195936107. The next prime is 195936137. The reversal of 195936129 is 921639591.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 193766400 + 2169729 = 13920^2 + 1473^2 .

It is not a de Polignac number, because 195936129 - 2⁷ = 195936001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (195936199) 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 in 5 ways as a sum of consecutive naturals, for example, 10885332 + ... + 10885349.

It is an arithmetic number, because the mean of its divisors is an integer number (47169811).

Almost surely, 2^195936129 is an apocalyptic number.

It is an amenable number.

195936129 is a deficient number, since it is larger than the sum of its proper divisors (87082737).

195936129 is a wasteful number, since it uses less digits than its factorization.

195936129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21770687 (or 21770684 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 195936129 is about 13997.7187069894. The cubic root of 195936129 is about 580.8154690601.

The spelling of 195936129 in words is "one hundred ninety-five million, nine hundred thirty-six thousand, one hundred twenty-nine".