197220129 has 8 divisors (see below), whose sum is σ = 263135712. Its totient is φ = 131392320.

The previous prime is 197220091. The next prime is 197220139. The reversal of 197220129 is 921022791.

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

It is a de Polignac number, because none of the positive numbers 2^k-197220129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197220129.

It is not an unprimeable number, because it can be changed into a prime (197220139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16507 + ... + 25824.

It is an arithmetic number, because the mean of its divisors is an integer number (32891964).

Almost surely, 2^197220129 is an apocalyptic number.

It is an amenable number.

197220129 is a deficient number, since it is larger than the sum of its proper divisors (65915583).

197220129 is a wasteful number, since it uses less digits than its factorization.

197220129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43887.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 197220129 is about 14043.5084291640. The cubic root of 197220129 is about 582.0814324950.

The spelling of 197220129 in words is "one hundred ninety-seven million, two hundred twenty thousand, one hundred twenty-nine".