197040689 has 2 divisors, whose sum is σ = 197040690. Its totient is φ = 197040688.

The previous prime is 197040673. The next prime is 197040709. The reversal of 197040689 is 986040791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196925089 + 115600 = 14033^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 197040689 - 2⁴ = 197040673 is a prime.

It is a super-3 number, since 3×197040689³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197048689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98520344 + 98520345.

It is an arithmetic number, because the mean of its divisors is an integer number (98520345).

Almost surely, 2^197040689 is an apocalyptic number.

It is an amenable number.

197040689 is a deficient number, since it is larger than the sum of its proper divisors (1).

197040689 is an equidigital number, since it uses as much as digits as its factorization.

197040689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 197040689 is about 14037.1182583891. The cubic root of 197040689 is about 581.9048440534.

The spelling of 197040689 in words is "one hundred ninety-seven million, forty thousand, six hundred eighty-nine".