195986398 has 4 divisors (see below), whose sum is σ = 293979600. Its totient is φ = 97993198.

The previous prime is 195986363. The next prime is 195986419. The reversal of 195986398 is 893689591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 893689591 = 29611 ⋅30181.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 48996598 + ... + 48996601.

It is an arithmetic number, because the mean of its divisors is an integer number (73494900).

Almost surely, 2^195986398 is an apocalyptic number.

195986398 is a deficient number, since it is larger than the sum of its proper divisors (97993202).

195986398 is an equidigital number, since it uses as much as digits as its factorization.

195986398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97993201.

The product of its digits is 4199040, while the sum is 58.

The square root of 195986398 is about 13999.5142058573. The cubic root of 195986398 is about 580.8651357830.

The spelling of 195986398 in words is "one hundred ninety-five million, nine hundred eighty-six thousand, three hundred ninety-eight".