164489197 has 2 divisors, whose sum is σ = 164489198. Its totient is φ = 164489196.

The previous prime is 164489191. The next prime is 164489201. The reversal of 164489197 is 791984461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146264836 + 18224361 = 12094^2 + 4269^2 .

It is a cyclic number.

It is not a de Polignac number, because 164489197 - 2²³ = 156100589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164489197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164489191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82244598 + 82244599.

It is an arithmetic number, because the mean of its divisors is an integer number (82244599).

Almost surely, 2^164489197 is an apocalyptic number.

It is an amenable number.

164489197 is a deficient number, since it is larger than the sum of its proper divisors (1).

164489197 is an equidigital number, since it uses as much as digits as its factorization.

164489197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 164489197 is about 12825.3341866791. The cubic root of 164489197 is about 547.9140791376.

The spelling of 164489197 in words is "one hundred sixty-four million, four hundred eighty-nine thousand, one hundred ninety-seven".