195829934921 has 2 divisors, whose sum is σ = 195829934922. Its totient is φ = 195829934920.

The previous prime is 195829934821. The next prime is 195829934941. The reversal of 195829934921 is 129439928591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171074059321 + 24755875600 = 413611^2 + 157340^2 .

It is an emirp because it is prime and its reverse (129439928591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195829934921 - 2²⁶ = 195762826057 is a prime.

It is a super-2 number, since 2×195829934921² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (195829934941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97914967460 + 97914967461.

It is an arithmetic number, because the mean of its divisors is an integer number (97914967461).

Almost surely, 2^195829934921 is an apocalyptic number.

It is an amenable number.

195829934921 is a deficient number, since it is larger than the sum of its proper divisors (1).

195829934921 is an equidigital number, since it uses as much as digits as its factorization.

195829934921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12597120, while the sum is 62.

The spelling of 195829934921 in words is "one hundred ninety-five billion, eight hundred twenty-nine million, nine hundred thirty-four thousand, nine hundred twenty-one".