196667389 has 2 divisors, whose sum is σ = 196667390. Its totient is φ = 196667388.

The previous prime is 196667371. The next prime is 196667413. The reversal of 196667389 is 983766691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171164889 + 25502500 = 13083^2 + 5050^2 .

It is a cyclic number.

It is not a de Polignac number, because 196667389 - 2¹⁷ = 196536317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196667189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98333694 + 98333695.

It is an arithmetic number, because the mean of its divisors is an integer number (98333695).

Almost surely, 2^196667389 is an apocalyptic number.

It is an amenable number.

196667389 is a deficient number, since it is larger than the sum of its proper divisors (1).

196667389 is an equidigital number, since it uses as much as digits as its factorization.

196667389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 55.

The square root of 196667389 is about 14023.8150658086. The cubic root of 196667389 is about 581.5371325180.

The spelling of 196667389 in words is "one hundred ninety-six million, six hundred sixty-seven thousand, three hundred eighty-nine".