89666197 has 2 divisors, whose sum is σ = 89666198. Its totient is φ = 89666196.

The previous prime is 89666183. The next prime is 89666201. The reversal of 89666197 is 79166698.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68790436 + 20875761 = 8294^2 + 4569^2 .

It is a cyclic number.

It is not a de Polignac number, because 89666197 - 2⁷ = 89666069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89666117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44833098 + 44833099.

It is an arithmetic number, because the mean of its divisors is an integer number (44833099).

Almost surely, 2^89666197 is an apocalyptic number.

It is an amenable number.

89666197 is a deficient number, since it is larger than the sum of its proper divisors (1).

89666197 is an equidigital number, since it uses as much as digits as its factorization.

89666197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The square root of 89666197 is about 9469.2236746209. The cubic root of 89666197 is about 447.5857488895.

The spelling of 89666197 in words is "eighty-nine million, six hundred sixty-six thousand, one hundred ninety-seven".