195139 has 8 divisors (see below), whose sum is σ = 227168. Its totient is φ = 164160.

The previous prime is 195137. The next prime is 195157. The reversal of 195139 is 931591.

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 195139 - 2¹ = 195137 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (195131) 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, 199 + ... + 655.

It is an arithmetic number, because the mean of its divisors is an integer number (28396).

2¹⁹⁵¹³⁹ is an apocalyptic number.

195139 is a deficient number, since it is larger than the sum of its proper divisors (32029).

195139 is an equidigital number, since it uses as much as digits as its factorization.

195139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525.

The product of its digits is 1215, while the sum is 28.

The square root of 195139 is about 441.7454017870. The cubic root of 195139 is about 58.0026752630.

The spelling of 195139 in words is "one hundred ninety-five thousand, one hundred thirty-nine".