197861193 has 24 divisors (see below), whose sum is σ = 301901600. Its totient is φ = 124524864.

The previous prime is 197861179. The next prime is 197861239. The reversal of 197861193 is 391168791.

It is not a de Polignac number, because 197861193 - 2⁴ = 197861177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (197861093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50613 + ... + 54381.

Almost surely, 2^197861193 is an apocalyptic number.

It is an amenable number.

197861193 is a deficient number, since it is larger than the sum of its proper divisors (104040407).

197861193 is a wasteful number, since it uses less digits than its factorization.

197861193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101 (or 4098 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 197861193 is about 14066.3141227544. The cubic root of 197861193 is about 582.7114355822.

The spelling of 197861193 in words is "one hundred ninety-seven million, eight hundred sixty-one thousand, one hundred ninety-three".