195374991 has 16 divisors (see below), whose sum is σ = 298266624. Its totient is φ = 111435744.

The previous prime is 195374987. The next prime is 195375007. The reversal of 195374991 is 199473591.

It is not a de Polignac number, because 195374991 - 2² = 195374987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195374991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195374951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3346 + ... + 20048.

It is an arithmetic number, because the mean of its divisors is an integer number (18641664).

Almost surely, 2^195374991 is an apocalyptic number.

195374991 is a deficient number, since it is larger than the sum of its proper divisors (102891633).

195374991 is a wasteful number, since it uses less digits than its factorization.

195374991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17270.

The product of its digits is 306180, while the sum is 48.

The square root of 195374991 is about 13977.6604265521. The cubic root of 195374991 is about 580.2604765426.

The spelling of 195374991 in words is "one hundred ninety-five million, three hundred seventy-four thousand, nine hundred ninety-one".