195979133 has 4 divisors (see below), whose sum is σ = 223976160. Its totient is φ = 167982108.

The previous prime is 195979127. The next prime is 195979151. The reversal of 195979133 is 331979591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331979591 = 107 ⋅3102613.

It is not a de Polignac number, because 195979133 - 2⁸ = 195978877 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 (195979123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13998503 + ... + 13998516.

It is an arithmetic number, because the mean of its divisors is an integer number (55994040).

Almost surely, 2^195979133 is an apocalyptic number.

It is an amenable number.

195979133 is a deficient number, since it is larger than the sum of its proper divisors (27997027).

195979133 is an equidigital number, since it uses as much as digits as its factorization.

195979133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27997026.

The product of its digits is 229635, while the sum is 47.

The square root of 195979133 is about 13999.2547301633. The cubic root of 195979133 is about 580.8579583506.

The spelling of 195979133 in words is "one hundred ninety-five million, nine hundred seventy-nine thousand, one hundred thirty-three".