197520971 has 8 divisors (see below), whose sum is σ = 199874400. Its totient is φ = 195177600.

The previous prime is 197520959. The next prime is 197520997. The reversal of 197520971 is 179025791.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 197520971 - 2⁶ = 197520907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197520901) 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 7 ways as a sum of consecutive naturals, for example, 41450 + ... + 45968.

It is an arithmetic number, because the mean of its divisors is an integer number (24984300).

Almost surely, 2^197520971 is an apocalyptic number.

197520971 is a deficient number, since it is larger than the sum of its proper divisors (2353429).

197520971 is a wasteful number, since it uses less digits than its factorization.

197520971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5029.

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 197520971 is about 14054.2154174468. The cubic root of 197520971 is about 582.3772535114.

The spelling of 197520971 in words is "one hundred ninety-seven million, five hundred twenty thousand, nine hundred seventy-one".