164198917 has 2 divisors, whose sum is σ = 164198918. Its totient is φ = 164198916.

The previous prime is 164198849. The next prime is 164198927. The reversal of 164198917 is 719891461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146676321 + 17522596 = 12111^2 + 4186^2 .

It is a cyclic number.

It is not a de Polignac number, because 164198917 - 2¹⁹ = 163674629 is a prime.

It is a super-2 number, since 2×164198917² = 53922568687945778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164198927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82099458 + 82099459.

It is an arithmetic number, because the mean of its divisors is an integer number (82099459).

Almost surely, 2^164198917 is an apocalyptic number.

It is an amenable number.

164198917 is a deficient number, since it is larger than the sum of its proper divisors (1).

164198917 is an equidigital number, since it uses as much as digits as its factorization.

164198917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 46.

The square root of 164198917 is about 12814.0125253568. The cubic root of 164198917 is about 547.5915814636.

The spelling of 164198917 in words is "one hundred sixty-four million, one hundred ninety-eight thousand, nine hundred seventeen".