197393997 has 8 divisors (see below), whose sum is σ = 263257920. Its totient is φ = 131563040.

The previous prime is 197393909. The next prime is 197394007. The reversal of 197393997 is 799393791.

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 197393997 - 2⁸ = 197393741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197393197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15529 + ... + 25217.

It is an arithmetic number, because the mean of its divisors is an integer number (32907240).

Almost surely, 2^197393997 is an apocalyptic number.

It is an amenable number.

197393997 is a deficient number, since it is larger than the sum of its proper divisors (65863923).

197393997 is an equidigital number, since it uses as much as digits as its factorization.

197393997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16483.

The product of its digits is 2893401, while the sum is 57.

The square root of 197393997 is about 14049.6973988766. The cubic root of 197393997 is about 582.2524353382.

The spelling of 197393997 in words is "one hundred ninety-seven million, three hundred ninety-three thousand, nine hundred ninety-seven".