195870865 has 16 divisors (see below), whose sum is σ = 243150336. Its totient is φ = 151315200.

The previous prime is 195870863. The next prime is 195870887. The reversal of 195870865 is 568078591.

It is not a de Polignac number, because 195870865 - 2¹ = 195870863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195870863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90850 + ... + 92980.

It is an arithmetic number, because the mean of its divisors is an integer number (15196896).

Almost surely, 2^195870865 is an apocalyptic number.

It is an amenable number.

195870865 is a deficient number, since it is larger than the sum of its proper divisors (47279471).

195870865 is a wasteful number, since it uses less digits than its factorization.

195870865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760.

The product of its (nonzero) digits is 604800, while the sum is 49.

The square root of 195870865 is about 13995.3872758134. The cubic root of 195870865 is about 580.7509743181.

The spelling of 195870865 in words is "one hundred ninety-five million, eight hundred seventy thousand, eight hundred sixty-five".