195145189 has 4 divisors (see below), whose sum is σ = 195982956. Its totient is φ = 194307424.

The previous prime is 195145187. The next prime is 195145213. The reversal of 195145189 is 981541591.

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 116964225 + 78180964 = 10815^2 + 8842^2 .

It is a cyclic number.

It is not a de Polignac number, because 195145189 - 2¹ = 195145187 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 (195145183) 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, 418534 + ... + 418999.

It is an arithmetic number, because the mean of its divisors is an integer number (48995739).

Almost surely, 2^195145189 is an apocalyptic number.

It is an amenable number.

195145189 is a deficient number, since it is larger than the sum of its proper divisors (837767).

195145189 is an equidigital number, since it uses as much as digits as its factorization.

195145189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837766.

The product of its digits is 64800, while the sum is 43.

The square root of 195145189 is about 13969.4376765853. The cubic root of 195145189 is about 580.0328845802.

The spelling of 195145189 in words is "one hundred ninety-five million, one hundred forty-five thousand, one hundred eighty-nine".