197872129 has 24 divisors (see below), whose sum is σ = 259303680. Its totient is φ = 147333888.

The previous prime is 197872123. The next prime is 197872141. The reversal of 197872129 is 921278791.

It is not a de Polignac number, because 197872129 - 2⁵ = 197872097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197872123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15192 + ... + 25030.

It is an arithmetic number, because the mean of its divisors is an integer number (10804320).

Almost surely, 2^197872129 is an apocalyptic number.

It is an amenable number.

197872129 is a deficient number, since it is larger than the sum of its proper divisors (61431551).

197872129 is a wasteful number, since it uses less digits than its factorization.

197872129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9889 (or 9876 counting only the distinct ones).

The product of its digits is 127008, while the sum is 46.

The square root of 197872129 is about 14066.7028475048. The cubic root of 197872129 is about 582.7221710794.

The spelling of 197872129 in words is "one hundred ninety-seven million, eight hundred seventy-two thousand, one hundred twenty-nine".