197900129 has 4 divisors (see below), whose sum is σ = 226171584. Its totient is φ = 169628676.

The previous prime is 197900117. The next prime is 197900141. The reversal of 197900129 is 921009791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (197900117) and next prime (197900141).

It is not a de Polignac number, because 197900129 - 2⁴ = 197900113 is a prime.

It is a super-2 number, since 2×197900129² = 78328922116433282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197900092 and 197900101.

It is not an unprimeable number, because it can be changed into a prime (197900149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14135717 + ... + 14135730.

It is an arithmetic number, because the mean of its divisors is an integer number (56542896).

Almost surely, 2^197900129 is an apocalyptic number.

It is an amenable number.

197900129 is a deficient number, since it is larger than the sum of its proper divisors (28271455).

197900129 is an equidigital number, since it uses as much as digits as its factorization.

197900129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28271454.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 197900129 is about 14067.6980704023. The cubic root of 197900129 is about 582.7496559191.

The spelling of 197900129 in words is "one hundred ninety-seven million, nine hundred thousand, one hundred twenty-nine".