195906829 has 2 divisors, whose sum is σ = 195906830. Its totient is φ = 195906828.

The previous prime is 195906817. The next prime is 195906869. The reversal of 195906829 is 928609591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106131204 + 89775625 = 10302^2 + 9475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195906829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195906869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97953414 + 97953415.

It is an arithmetic number, because the mean of its divisors is an integer number (97953415).

Almost surely, 2^195906829 is an apocalyptic number.

It is an amenable number.

195906829 is a deficient number, since it is larger than the sum of its proper divisors (1).

195906829 is an equidigital number, since it uses as much as digits as its factorization.

195906829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 195906829 is about 13996.6720687455. The cubic root of 195906829 is about 580.7865161871.

The spelling of 195906829 in words is "one hundred ninety-five million, nine hundred six thousand, eight hundred twenty-nine".