197994757 has 8 divisors (see below), whose sum is σ = 200662560. Its totient is φ = 195333840.

The previous prime is 197994749. The next prime is 197994773. The reversal of 197994757 is 757499791.

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 197994757 - 2³ = 197994749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197994157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83407 + ... + 85747.

It is an arithmetic number, because the mean of its divisors is an integer number (25082820).

Almost surely, 2^197994757 is an apocalyptic number.

It is an amenable number.

197994757 is a deficient number, since it is larger than the sum of its proper divisors (2667803).

197994757 is a wasteful number, since it uses less digits than its factorization.

197994757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3443.

The product of its digits is 5000940, while the sum is 58.

The square root of 197994757 is about 14071.0609763443. The cubic root of 197994757 is about 582.8425237169.

The spelling of 197994757 in words is "one hundred ninety-seven million, nine hundred ninety-four thousand, seven hundred fifty-seven".