195878813 has 8 divisors (see below), whose sum is σ = 211209600. Its totient is φ = 180585648.

The previous prime is 195878773. The next prime is 195878821. The reversal of 195878813 is 318878591.

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 195878813 - 2¹⁰ = 195877789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195878413) 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 7 ways as a sum of consecutive naturals, for example, 1928 + ... + 19886.

It is an arithmetic number, because the mean of its divisors is an integer number (26401200).

Almost surely, 2^195878813 is an apocalyptic number.

195878813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

195878813 is a deficient number, since it is larger than the sum of its proper divisors (15330787).

195878813 is a wasteful number, since it uses less digits than its factorization.

195878813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18811.

The product of its digits is 483840, while the sum is 50.

The square root of 195878813 is about 13995.6712236320. The cubic root of 195878813 is about 580.7588294022.

It can be divided in two parts, 195878 and 813, that added together give a palindrome (196691).

The spelling of 195878813 in words is "one hundred ninety-five million, eight hundred seventy-eight thousand, eight hundred thirteen".