197189312691 has 8 divisors (see below), whose sum is σ = 300478952704. Its totient is φ = 112679607240.

The previous prime is 197189312687. The next prime is 197189312783. The reversal of 197189312691 is 196213981791.

It is a happy number.

197189312691 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 not a de Polignac number, because 197189312691 - 2² = 197189312687 is a prime.

It is a super-2 number, since 2×197189312691² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (197189312651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4694983615 + ... + 4694983656.

It is an arithmetic number, because the mean of its divisors is an integer number (37559869088).

Almost surely, 2^197189312691 is an apocalyptic number.

197189312691 is a deficient number, since it is larger than the sum of its proper divisors (103289640013).

197189312691 is an equidigital number, since it uses as much as digits as its factorization.

197189312691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9389967281.

The product of its digits is 1469664, while the sum is 57.

The spelling of 197189312691 in words is "one hundred ninety-seven billion, one hundred eighty-nine million, three hundred twelve thousand, six hundred ninety-one".