197550869 has 2 divisors, whose sum is σ = 197550870. Its totient is φ = 197550868.

The previous prime is 197550853. The next prime is 197550883. The reversal of 197550869 is 968055791.

It is a happy number.

197550869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111302500 + 86248369 = 10550^2 + 9287^2 .

It is a cyclic number.

It is not a de Polignac number, because 197550869 - 2⁴ = 197550853 is a prime.

It is a super-3 number, since 3×197550869³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197550839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98775434 + 98775435.

It is an arithmetic number, because the mean of its divisors is an integer number (98775435).

Almost surely, 2^197550869 is an apocalyptic number.

It is an amenable number.

197550869 is a deficient number, since it is larger than the sum of its proper divisors (1).

197550869 is an equidigital number, since it uses as much as digits as its factorization.

197550869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 197550869 is about 14055.2790438326. The cubic root of 197550869 is about 582.4066361074.

The spelling of 197550869 in words is "one hundred ninety-seven million, five hundred fifty thousand, eight hundred sixty-nine".