195040861 has 4 divisors (see below), whose sum is σ = 195493824. Its totient is φ = 194587900.

The previous prime is 195040841. The next prime is 195040873. The reversal of 195040861 is 168040591.

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: 168040591 = 41 ⋅4098551.

It is a cyclic number.

It is not a de Polignac number, because 195040861 - 2⁵ = 195040829 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 (195040841) 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 3 ways as a sum of consecutive naturals, for example, 225835 + ... + 226696.

It is an arithmetic number, because the mean of its divisors is an integer number (48873456).

Almost surely, 2^195040861 is an apocalyptic number.

It is an amenable number.

195040861 is a deficient number, since it is larger than the sum of its proper divisors (452963).

195040861 is an equidigital number, since it uses as much as digits as its factorization.

195040861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452962.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 195040861 is about 13965.7030256267. The cubic root of 195040861 is about 579.9295009437.

The spelling of 195040861 in words is "one hundred ninety-five million, forty thousand, eight hundred sixty-one".