195807 has 4 divisors (see below), whose sum is σ = 261080. Its totient is φ = 130536.

The previous prime is 195791. The next prime is 195809. The reversal of 195807 is 708591.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 195807 - 2⁴ = 195791 is a prime.

It is a D-number.

It is the 443-rd Hogben number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 195807.

It is not an unprimeable number, because it can be changed into a prime (195809) by changing a digit.

It is a nontrivial repunit in base 442.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32632 + ... + 32637.

It is an arithmetic number, because the mean of its divisors is an integer number (65270).

2¹⁹⁵⁸⁰⁷ is an apocalyptic number.

195807 is a deficient number, since it is larger than the sum of its proper divisors (65273).

195807 is an equidigital number, since it uses as much as digits as its factorization.

195807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65272.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 195807 is about 442.5008474568. The cubic root of 195807 is about 58.0687848216.

The spelling of 195807 in words is "one hundred ninety-five thousand, eight hundred seven".