197956009 has 8 divisors (see below), whose sum is σ = 208570752. Its totient is φ = 187508640.

The previous prime is 197955997. The next prime is 197956013. The reversal of 197956009 is 900659791.

197956009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 197956009 - 2²¹ = 195858857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197956009.

It is not an unprimeable number, because it can be changed into a prime (197956019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39412 + ... + 44149.

It is an arithmetic number, because the mean of its divisors is an integer number (26071344).

Almost surely, 2^197956009 is an apocalyptic number.

It is an amenable number.

197956009 is a deficient number, since it is larger than the sum of its proper divisors (10614743).

197956009 is a wasteful number, since it uses less digits than its factorization.

197956009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83687.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 197956009 is about 14069.6840405178. The cubic root of 197956009 is about 582.8045000577.

The spelling of 197956009 in words is "one hundred ninety-seven million, nine hundred fifty-six thousand, nine".