197664234 has 16 divisors (see below), whose sum is σ = 403740288. Its totient is φ = 64486112.

The previous prime is 197664227. The next prime is 197664289. The reversal of 197664234 is 432466791.

It is a super-2 number, since 2×197664234² = 78142298805613512, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350187 + ... + 350750.

It is an arithmetic number, because the mean of its divisors is an integer number (25233768).

Almost surely, 2^197664234 is an apocalyptic number.

197664234 is an abundant number, since it is smaller than the sum of its proper divisors (206076054).

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

197664234 is a wasteful number, since it uses less digits than its factorization.

197664234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700989.

The product of its digits is 217728, while the sum is 42.

The square root of 197664234 is about 14059.3112918094. The cubic root of 197664234 is about 582.5180199132.

The spelling of 197664234 in words is "one hundred ninety-seven million, six hundred sixty-four thousand, two hundred thirty-four".