195820147 has 4 divisors (see below), whose sum is σ = 195850480. Its totient is φ = 195789816.

The previous prime is 195820139. The next prime is 195820181. The reversal of 195820147 is 741028591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 741028591 = 2591 ⋅286001.

It is a cyclic number.

It is not a de Polignac number, because 195820147 - 2³ = 195820139 is a prime.

It is a super-2 number, since 2×195820147² = 76691059942203218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195820117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188 + ... + 19825.

It is an arithmetic number, because the mean of its divisors is an integer number (48962620).

Almost surely, 2^195820147 is an apocalyptic number.

195820147 is a deficient number, since it is larger than the sum of its proper divisors (30333).

195820147 is an equidigital number, since it uses as much as digits as its factorization.

195820147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30332.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 195820147 is about 13993.5752043572. The cubic root of 195820147 is about 580.7008442310.

The spelling of 195820147 in words is "one hundred ninety-five million, eight hundred twenty thousand, one hundred forty-seven".