197819051 has 4 divisors (see below), whose sum is σ = 208230600. Its totient is φ = 187407504.

The previous prime is 197819047. The next prime is 197819053. The reversal of 197819051 is 150918791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 197819051 - 2² = 197819047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197819053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5205746 + ... + 5205783.

It is an arithmetic number, because the mean of its divisors is an integer number (52057650).

Almost surely, 2^197819051 is an apocalyptic number.

197819051 is a deficient number, since it is larger than the sum of its proper divisors (10411549).

197819051 is a wasteful number, since it uses less digits than its factorization.

197819051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10411548.

The product of its (nonzero) digits is 22680, while the sum is 41.

The square root of 197819051 is about 14064.8160670519. The cubic root of 197819051 is about 582.6700625224.

The spelling of 197819051 in words is "one hundred ninety-seven million, eight hundred nineteen thousand, fifty-one".