197018669 has 2 divisors, whose sum is σ = 197018670. Its totient is φ = 197018668.

The previous prime is 197018573. The next prime is 197018687. The reversal of 197018669 is 966810791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195160900 + 1857769 = 13970^2 + 1363^2 .

It is a cyclic number.

It is not a de Polignac number, because 197018669 - 2⁸ = 197018413 is a prime.

It is a super-2 number, since 2×197018669² = 77632711869063122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197018369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98509334 + 98509335.

It is an arithmetic number, because the mean of its divisors is an integer number (98509335).

Almost surely, 2^197018669 is an apocalyptic number.

It is an amenable number.

197018669 is a deficient number, since it is larger than the sum of its proper divisors (1).

197018669 is an equidigital number, since it uses as much as digits as its factorization.

197018669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 197018669 is about 14036.3338874508. Note that the first 3 decimals coincide. The cubic root of 197018669 is about 581.8831665984.

The spelling of 197018669 in words is "one hundred ninety-seven million, eighteen thousand, six hundred sixty-nine".