197139 has 4 divisors (see below), whose sum is σ = 262856. Its totient is φ = 131424.

The previous prime is 197137. The next prime is 197147. The reversal of 197139 is 931791.

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

It is not a de Polignac number, because 197139 - 2¹ = 197137 is a prime.

It is a D-number.

It is a Duffinian number.

197139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (197137) 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, 32854 + ... + 32859.

It is an arithmetic number, because the mean of its divisors is an integer number (65714).

2¹⁹⁷¹³⁹ is an apocalyptic number.

197139 is a deficient number, since it is larger than the sum of its proper divisors (65717).

197139 is an equidigital number, since it uses as much as digits as its factorization.

197139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65716.

The product of its digits is 1701, while the sum is 30.

The square root of 197139 is about 444.0033783655. The cubic root of 197139 is about 58.2001606023.

The spelling of 197139 in words is "one hundred ninety-seven thousand, one hundred thirty-nine".