197899829 has 2 divisors, whose sum is σ = 197899830. Its totient is φ = 197899828.

The previous prime is 197899811. The next prime is 197899837. The reversal of 197899829 is 928998791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156000100 + 41899729 = 12490^2 + 6473^2 .

It is a cyclic number.

It is not a de Polignac number, because 197899829 - 2²⁰ = 196851253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197899859) 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 as a sum of consecutive naturals, namely, 98949914 + 98949915.

It is an arithmetic number, because the mean of its divisors is an integer number (98949915).

Almost surely, 2^197899829 is an apocalyptic number.

It is an amenable number.

197899829 is a deficient number, since it is larger than the sum of its proper divisors (1).

197899829 is an equidigital number, since it uses as much as digits as its factorization.

197899829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 62.

The square root of 197899829 is about 14067.6874076729. The cubic root of 197899829 is about 582.7493614524.

The spelling of 197899829 in words is "one hundred ninety-seven million, eight hundred ninety-nine thousand, eight hundred twenty-nine".