195911493 has 16 divisors (see below), whose sum is σ = 274260480. Its totient is φ = 124155504.

The previous prime is 195911491. The next prime is 195911503. The reversal of 195911493 is 394119591.

It is not a de Polignac number, because 195911493 - 2¹ = 195911491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195911491) 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, 2538 + ... + 19956.

It is an arithmetic number, because the mean of its divisors is an integer number (17141280).

Almost surely, 2^195911493 is an apocalyptic number.

It is an amenable number.

195911493 is a deficient number, since it is larger than the sum of its proper divisors (78348987).

195911493 is a wasteful number, since it uses less digits than its factorization.

195911493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17608.

The product of its digits is 43740, while the sum is 42.

The square root of 195911493 is about 13996.8386787874. The cubic root of 195911493 is about 580.7911251243.

The spelling of 195911493 in words is "one hundred ninety-five million, nine hundred eleven thousand, four hundred ninety-three".