195829934821 has 2 divisors, whose sum is σ = 195829934822. Its totient is φ = 195829934820.

The previous prime is 195829934803. The next prime is 195829934921. The reversal of 195829934821 is 128439928591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130454604225 + 65375330596 = 361185^2 + 255686^2 .

It is a cyclic number.

It is not a de Polignac number, because 195829934821 - 2⁵ = 195829934789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195829934821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195829934921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97914967410 + 97914967411.

It is an arithmetic number, because the mean of its divisors is an integer number (97914967411).

Almost surely, 2^195829934821 is an apocalyptic number.

It is an amenable number.

195829934821 is a deficient number, since it is larger than the sum of its proper divisors (1).

195829934821 is an equidigital number, since it uses as much as digits as its factorization.

195829934821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11197440, while the sum is 61.

The spelling of 195829934821 in words is "one hundred ninety-five billion, eight hundred twenty-nine million, nine hundred thirty-four thousand, eight hundred twenty-one".