197942072186 has 8 divisors (see below), whose sum is σ = 296928060660. Its totient is φ = 98966051968.

The previous prime is 197942072171. The next prime is 197942072201. The reversal of 197942072186 is 681270249791.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (197942072171) and next prime (197942072201).

It can be written as a sum of positive squares in 2 ways, for example, as 196354448161 + 1587624025 = 443119^2 + 39845^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2442221 + ... + 2521968.

Almost surely, 2^197942072186 is an apocalyptic number.

197942072186 is a deficient number, since it is larger than the sum of its proper divisors (98985988474).

197942072186 is a wasteful number, since it uses less digits than its factorization.

197942072186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984128.

The product of its (nonzero) digits is 3048192, while the sum is 56.

The spelling of 197942072186 in words is "one hundred ninety-seven billion, nine hundred forty-two million, seventy-two thousand, one hundred eighty-six".