197019906 has 8 divisors (see below), whose sum is σ = 394039824. Its totient is φ = 65673300.

The previous prime is 197019877. The next prime is 197019947. The reversal of 197019906 is 609910791.

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

197019906 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16418320 + ... + 16418331.

It is an arithmetic number, because the mean of its divisors is an integer number (49254978).

Almost surely, 2^197019906 is an apocalyptic number.

197019906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197019906 is a wasteful number, since it uses less digits than its factorization.

197019906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32836656.

The product of its (nonzero) digits is 30618, while the sum is 42.

The square root of 197019906 is about 14036.3779515942. The cubic root of 197019906 is about 581.8843843983.

The spelling of 197019906 in words is "one hundred ninety-seven million, nineteen thousand, nine hundred six".