195861139 has 8 divisors (see below), whose sum is σ = 208297040. Its totient is φ = 183638016.

The previous prime is 195861137. The next prime is 195861151. The reversal of 195861139 is 931168591.

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 195861139 - 2¹ = 195861137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195861095 and 195861104.

It is not an unprimeable number, because it can be changed into a prime (195861137) 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, 51294 + ... + 54979.

It is an arithmetic number, because the mean of its divisors is an integer number (26037130).

Almost surely, 2^195861139 is an apocalyptic number.

195861139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

195861139 is a deficient number, since it is larger than the sum of its proper divisors (12435901).

195861139 is a wasteful number, since it uses less digits than its factorization.

195861139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106389.

The product of its digits is 58320, while the sum is 43.

The square root of 195861139 is about 13995.0397998720. The cubic root of 195861139 is about 580.7413617307.

The spelling of 195861139 in words is "one hundred ninety-five million, eight hundred sixty-one thousand, one hundred thirty-nine".