197609959969 has 4 divisors (see below), whose sum is σ = 200316945796. Its totient is φ = 194902974144.

The previous prime is 197609959931. The next prime is 197609960011. The reversal of 197609959969 is 969959906791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37440315025 + 160169644944 = 193495^2 + 400212^2 .

It is a cyclic number.

It is not a de Polignac number, because 197609959969 - 2³³ = 189020025377 is a prime.

It is a super-2 number, since 2×197609959969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197609959069) 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, 1353492804 + ... + 1353492949.

It is an arithmetic number, because the mean of its divisors is an integer number (50079236449).

Almost surely, 2^197609959969 is an apocalyptic number.

It is an amenable number.

197609959969 is a deficient number, since it is larger than the sum of its proper divisors (2706985827).

197609959969 is an equidigital number, since it uses as much as digits as its factorization.

197609959969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706985826.

The product of its (nonzero) digits is 669615660, while the sum is 79.

The spelling of 197609959969 in words is "one hundred ninety-seven billion, six hundred nine million, nine hundred fifty-nine thousand, nine hundred sixty-nine".