197678893 has 2 divisors, whose sum is σ = 197678894. Its totient is φ = 197678892.

The previous prime is 197678881. The next prime is 197678903. The reversal of 197678893 is 398876791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197627364 + 51529 = 14058^2 + 227^2 .

It is a cyclic number.

It is not a de Polignac number, because 197678893 - 2⁵ = 197678861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197678843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98839446 + 98839447.

It is an arithmetic number, because the mean of its divisors is an integer number (98839447).

Almost surely, 2^197678893 is an apocalyptic number.

It is an amenable number.

197678893 is a deficient number, since it is larger than the sum of its proper divisors (1).

197678893 is an equidigital number, since it uses as much as digits as its factorization.

197678893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 58.

The square root of 197678893 is about 14059.8326092454. The cubic root of 197678893 is about 582.5324196192.

The spelling of 197678893 in words is "one hundred ninety-seven million, six hundred seventy-eight thousand, eight hundred ninety-three".