197995139 has 8 divisors (see below), whose sum is σ = 200319840. Its totient is φ = 195676416.

The previous prime is 197995123. The next prime is 197995153. The reversal of 197995139 is 931599791.

It is a happy number.

197995139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 197995139 - 2⁴ = 197995123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197995739) 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, 117797 + ... + 119465.

It is an arithmetic number, because the mean of its divisors is an integer number (25039980).

Almost surely, 2^197995139 is an apocalyptic number.

197995139 is a deficient number, since it is larger than the sum of its proper divisors (2324701).

197995139 is a wasteful number, since it uses less digits than its factorization.

197995139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989.

The product of its digits is 688905, while the sum is 53.

The square root of 197995139 is about 14071.0745502964. The cubic root of 197995139 is about 582.8428985512.

The spelling of 197995139 in words is "one hundred ninety-seven million, nine hundred ninety-five thousand, one hundred thirty-nine".