197645029 has 2 divisors, whose sum is σ = 197645030. Its totient is φ = 197645028.

The previous prime is 197645027. The next prime is 197645039. The reversal of 197645029 is 920546791.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123254404 + 74390625 = 11102^2 + 8625^2 .

It is a cyclic number.

It is not a de Polignac number, because 197645029 - 2¹ = 197645027 is a prime.

Together with 197645027, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197645027) 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, 98822514 + 98822515.

It is an arithmetic number, because the mean of its divisors is an integer number (98822515).

Almost surely, 2^197645029 is an apocalyptic number.

It is an amenable number.

197645029 is a deficient number, since it is larger than the sum of its proper divisors (1).

197645029 is an equidigital number, since it uses as much as digits as its factorization.

197645029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 197645029 is about 14058.6282759023. The cubic root of 197645029 is about 582.4991535412.

The spelling of 197645029 in words is "one hundred ninety-seven million, six hundred forty-five thousand, twenty-nine".