195692121 has 9 divisors (see below), whose sum is σ = 282727029. Its totient is φ = 130433436.

The previous prime is 195692111. The next prime is 195692129. The reversal of 195692121 is 121296591.

The square root of 195692121 is 13989.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 195692121 - 2¹⁷ = 195561049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (195692129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39636 + ... + 44298.

Almost surely, 2^195692121 is an apocalyptic number.

195692121 is the 13989-th square number.

195692121 is the 6995-th centered octagonal number.

It is an amenable number.

195692121 is a deficient number, since it is larger than the sum of its proper divisors (87034908).

195692121 is an frugal number, since it uses more digits than its factorization.

195692121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9332 (or 4666 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The cubic root of 195692121 is about 580.5742637687.

Multiplying 195692121 by its sum of digits (36), we get a square (7044916356 = 83934²).

The spelling of 195692121 in words is "one hundred ninety-five million, six hundred ninety-two thousand, one hundred twenty-one".