197700869 has 2 divisors, whose sum is σ = 197700870. Its totient is φ = 197700868.

The previous prime is 197700793. The next prime is 197700889. The reversal of 197700869 is 968007791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141300769 + 56400100 = 11887^2 + 7510^2 .

It is a cyclic number.

It is not a de Polignac number, because 197700869 - 2¹² = 197696773 is a prime.

It is a super-2 number, since 2×197700869² = 78171267206710322, which contains 22 as substring.

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 (197700889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98850434 + 98850435.

It is an arithmetic number, because the mean of its divisors is an integer number (98850435).

Almost surely, 2^197700869 is an apocalyptic number.

It is an amenable number.

197700869 is a deficient number, since it is larger than the sum of its proper divisors (1).

197700869 is an equidigital number, since it uses as much as digits as its factorization.

197700869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 197700869 is about 14060.6141046542. The cubic root of 197700869 is about 582.5540055658.

The spelling of 197700869 in words is "one hundred ninety-seven million, seven hundred thousand, eight hundred sixty-nine".