197566463 has 4 divisors (see below), whose sum is σ = 199484688. Its totient is φ = 195648240.

The previous prime is 197566429. The next prime is 197566489. The reversal of 197566463 is 364665791.

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 197566463 - 2⁸ = 197566207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197566423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 958958 + ... + 959163.

It is an arithmetic number, because the mean of its divisors is an integer number (49871172).

Almost surely, 2^197566463 is an apocalyptic number.

197566463 is a deficient number, since it is larger than the sum of its proper divisors (1918225).

197566463 is a wasteful number, since it uses less digits than its factorization.

197566463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918224.

The product of its digits is 816480, while the sum is 47.

The square root of 197566463 is about 14055.8337710717. The cubic root of 197566463 is about 582.4219601101.

The spelling of 197566463 in words is "one hundred ninety-seven million, five hundred sixty-six thousand, four hundred sixty-three".