197135819 has 8 divisors (see below), whose sum is σ = 198328560. Its totient is φ = 195947136.

The previous prime is 197135767. The next prime is 197135863. The reversal of 197135819 is 918531791.

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 197135819 - 2⁸ = 197135563 is a prime.

It is a super-2 number, since 2×197135819² = 77725062265601522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197135819.

It is not an unprimeable number, because it can be changed into a prime (197135879) 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, 174047 + ... + 175175.

It is an arithmetic number, because the mean of its divisors is an integer number (24791070).

Almost surely, 2^197135819 is an apocalyptic number.

197135819 is a deficient number, since it is larger than the sum of its proper divisors (1192741).

197135819 is a wasteful number, since it uses less digits than its factorization.

197135819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029.

The product of its digits is 68040, while the sum is 44.

The square root of 197135819 is about 14040.5063655126. The cubic root of 197135819 is about 581.9984756478.

The spelling of 197135819 in words is "one hundred ninety-seven million, one hundred thirty-five thousand, eight hundred nineteen".