197916193 has 8 divisors (see below), whose sum is σ = 209931912. Its totient is φ = 185942016.

The previous prime is 197916167. The next prime is 197916203. The reversal of 197916193 is 391619791.

It can be written as a sum of positive squares in 4 ways, for example, as 138579984 + 59336209 = 11772^2 + 7703^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 197916193 - 2⁵ = 197916161 is a prime.

It is a super-2 number, since 2×197916193² = 78341638903226498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (197916113) by changing a digit.

It is a Zeisel number, with parameters (35, -18).

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280 + ... + 19897.

It is an arithmetic number, because the mean of its divisors is an integer number (26241489).

Almost surely, 2^197916193 is an apocalyptic number.

It is an amenable number.

197916193 is a deficient number, since it is larger than the sum of its proper divisors (12015719).

197916193 is a wasteful number, since it uses less digits than its factorization.

197916193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20771.

The product of its digits is 91854, while the sum is 46.

The square root of 197916193 is about 14068.2690122133. The cubic root of 197916193 is about 582.7654231940.

The spelling of 197916193 in words is "one hundred ninety-seven million, nine hundred sixteen thousand, one hundred ninety-three".