195201997 has 4 divisors (see below), whose sum is σ = 195563356. Its totient is φ = 194840640.

The previous prime is 195201977. The next prime is 195202001. The reversal of 195201997 is 799102591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32103556 + 163098441 = 5666^2 + 12771^2 .

It is a cyclic number.

It is not a de Polignac number, because 195201997 - 2⁷ = 195201869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195201907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179868 + ... + 180949.

It is an arithmetic number, because the mean of its divisors is an integer number (48890839).

Almost surely, 2^195201997 is an apocalyptic number.

It is an amenable number.

195201997 is a deficient number, since it is larger than the sum of its proper divisors (361359).

195201997 is an equidigital number, since it uses as much as digits as its factorization.

195201997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361358.

The product of its (nonzero) digits is 51030, while the sum is 43.

The square root of 195201997 is about 13971.4708245052. The cubic root of 195201997 is about 580.0891628679.

The spelling of 195201997 in words is "one hundred ninety-five million, two hundred one thousand, nine hundred ninety-seven".