195091 has 8 divisors (see below), whose sum is σ = 215600. Its totient is φ = 175392.

The previous prime is 195089. The next prime is 195103. The reversal of 195091 is 190591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195091 - 2¹ = 195089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385 + ... + 733.

It is an arithmetic number, because the mean of its divisors is an integer number (26950).

2¹⁹⁵⁰⁹¹ is an apocalyptic number.

195091 is a deficient number, since it is larger than the sum of its proper divisors (20509).

195091 is a wasteful number, since it uses less digits than its factorization.

195091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 195091 is about 441.6910685083. The cubic root of 195091 is about 57.9979190692.

The spelling of 195091 in words is "one hundred ninety-five thousand, ninety-one".