195135879 has 4 divisors (see below), whose sum is σ = 260181176. Its totient is φ = 130090584.

The previous prime is 195135859. The next prime is 195135893. The reversal of 195135879 is 978531591.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 195135879 - 2⁸ = 195135623 is a prime.

It is a super-2 number, since 2×195135879² = 76156022546205282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195135859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32522644 + ... + 32522649.

It is an arithmetic number, because the mean of its divisors is an integer number (65045294).

Almost surely, 2^195135879 is an apocalyptic number.

195135879 is a deficient number, since it is larger than the sum of its proper divisors (65045297).

195135879 is an equidigital number, since it uses as much as digits as its factorization.

195135879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65045296.

The product of its digits is 340200, while the sum is 48.

The square root of 195135879 is about 13969.1044451676. The cubic root of 195135879 is about 580.0236603507.

The spelling of 195135879 in words is "one hundred ninety-five million, one hundred thirty-five thousand, eight hundred seventy-nine".