195033821 has 2 divisors, whose sum is σ = 195033822. Its totient is φ = 195033820.

The previous prime is 195033791. The next prime is 195033833. The reversal of 195033821 is 128330591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193627225 + 1406596 = 13915^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 195033821 - 2¹⁰ = 195032797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195035821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97516910 + 97516911.

It is an arithmetic number, because the mean of its divisors is an integer number (97516911).

Almost surely, 2^195033821 is an apocalyptic number.

It is an amenable number.

195033821 is a deficient number, since it is larger than the sum of its proper divisors (1).

195033821 is an equidigital number, since it uses as much as digits as its factorization.

195033821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 195033821 is about 13965.4509773226. The cubic root of 195033821 is about 579.9225233411.

The spelling of 195033821 in words is "one hundred ninety-five million, thirty-three thousand, eight hundred twenty-one".