196669897 has 2 divisors, whose sum is σ = 196669898. Its totient is φ = 196669896.

The previous prime is 196669883. The next prime is 196669901. The reversal of 196669897 is 798966691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113294736 + 83375161 = 10644^2 + 9131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196669897 is a prime.

It is not a weakly prime, because it can be changed into another prime (196669807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98334948 + 98334949.

It is an arithmetic number, because the mean of its divisors is an integer number (98334949).

Almost surely, 2^196669897 is an apocalyptic number.

It is an amenable number.

196669897 is a deficient number, since it is larger than the sum of its proper divisors (1).

196669897 is an equidigital number, since it uses as much as digits as its factorization.

196669897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 61.

The square root of 196669897 is about 14023.9044848430. The cubic root of 196669897 is about 581.5396045241.

The spelling of 196669897 in words is "one hundred ninety-six million, six hundred sixty-nine thousand, eight hundred ninety-seven".