195962021 has 2 divisors, whose sum is σ = 195962022. Its totient is φ = 195962020.

The previous prime is 195962017. The next prime is 195962113. The reversal of 195962021 is 120269591.

195962021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166693921 + 29268100 = 12911^2 + 5410^2 .

It is a cyclic number.

It is not a de Polignac number, because 195962021 - 2² = 195962017 is a prime.

It is a super-2 number, since 2×195962021² = 76802227348808882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195961021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97981010 + 97981011.

It is an arithmetic number, because the mean of its divisors is an integer number (97981011).

Almost surely, 2^195962021 is an apocalyptic number.

It is an amenable number.

195962021 is a deficient number, since it is larger than the sum of its proper divisors (1).

195962021 is an equidigital number, since it uses as much as digits as its factorization.

195962021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 195962021 is about 13998.6435414293. The cubic root of 195962021 is about 580.8410519067.

The spelling of 195962021 in words is "one hundred ninety-five million, nine hundred sixty-two thousand, twenty-one".