195249671 has 4 divisors (see below), whose sum is σ = 195360600. Its totient is φ = 195138744.

The previous prime is 195249631. The next prime is 195249679. The reversal of 195249671 is 176942591.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195249671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195249679) 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, 52781 + ... + 56358.

It is an arithmetic number, because the mean of its divisors is an integer number (48840150).

Almost surely, 2^195249671 is an apocalyptic number.

195249671 is a deficient number, since it is larger than the sum of its proper divisors (110929).

195249671 is a wasteful number, since it uses less digits than its factorization.

195249671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110928.

The product of its digits is 136080, while the sum is 44.

The square root of 195249671 is about 13973.1768399316. The cubic root of 195249671 is about 580.1363839006.

The spelling of 195249671 in words is "one hundred ninety-five million, two hundred forty-nine thousand, six hundred seventy-one".