195149 has 4 divisors (see below), whose sum is σ = 205440. Its totient is φ = 184860.

The previous prime is 195137. The next prime is 195157. The reversal of 195149 is 941591.

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: 941591 = 7 ⋅134513.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195149 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5117 + ... + 5154.

It is an arithmetic number, because the mean of its divisors is an integer number (51360).

2¹⁹⁵¹⁴⁹ is an apocalyptic number.

195149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

195149 is a deficient number, since it is larger than the sum of its proper divisors (10291).

195149 is a wasteful number, since it uses less digits than its factorization.

195149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10290.

The product of its digits is 1620, while the sum is 29.

The square root of 195149 is about 441.7567203790. The cubic root of 195149 is about 58.0036660386.

The spelling of 195149 in words is "one hundred ninety-five thousand, one hundred forty-nine".