197633906 has 8 divisors (see below), whose sum is σ = 296523180. Its totient is φ = 98792848.

The previous prime is 197633903. The next prime is 197633921. The reversal of 197633906 is 609336791.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 149206225 + 48427681 = 12215^2 + 6959^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (197633903) 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, 1040 + ... + 19908.

Almost surely, 2^197633906 is an apocalyptic number.

197633906 is a deficient number, since it is larger than the sum of its proper divisors (98889274).

197633906 is a wasteful number, since it uses less digits than its factorization.

197633906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24108.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 197633906 is about 14058.2326769761. The cubic root of 197633906 is about 582.4882261062.

The spelling of 197633906 in words is "one hundred ninety-seven million, six hundred thirty-three thousand, nine hundred six".