195278079 has 8 divisors (see below), whose sum is σ = 260472240. Its totient is φ = 130134656.

The previous prime is 195278077. The next prime is 195278087. The reversal of 195278079 is 970872591.

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 195278079 - 2¹ = 195278077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195278077) 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, 2544 + ... + 19925.

It is an arithmetic number, because the mean of its divisors is an integer number (32559030).

Almost surely, 2^195278079 is an apocalyptic number.

195278079 is a deficient number, since it is larger than the sum of its proper divisors (65194161).

195278079 is a wasteful number, since it uses less digits than its factorization.

195278079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25369.

The product of its (nonzero) digits is 317520, while the sum is 48.

The square root of 195278079 is about 13974.1933219775. The cubic root of 195278079 is about 580.1645183316.

The spelling of 195278079 in words is "one hundred ninety-five million, two hundred seventy-eight thousand, seventy-nine".