197686394 has 8 divisors (see below), whose sum is σ = 303425760. Its totient is φ = 96544476.

The previous prime is 197686373. The next prime is 197686397. The reversal of 197686394 is 493686791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (197686397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1149254 + ... + 1149425.

It is an arithmetic number, because the mean of its divisors is an integer number (37928220).

Almost surely, 2^197686394 is an apocalyptic number.

197686394 is a deficient number, since it is larger than the sum of its proper divisors (105739366).

197686394 is a wasteful number, since it uses less digits than its factorization.

197686394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298724.

The product of its digits is 1959552, while the sum is 53.

The square root of 197686394 is about 14060.0993595351. The cubic root of 197686394 is about 582.5397876634.

It can be divided in two parts, 19768 and 6394, that added together give a palindrome (26162).

The spelling of 197686394 in words is "one hundred ninety-seven million, six hundred eighty-six thousand, three hundred ninety-four".