164343187 has 2 divisors, whose sum is σ = 164343188. Its totient is φ = 164343186.

The previous prime is 164343181. The next prime is 164343191. The reversal of 164343187 is 781343461.

It is a strong prime.

It is an emirp because it is prime and its reverse (781343461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164343187 - 2¹⁹ = 163818899 is a prime.

It is a super-2 number, since 2×164343187² = 54017366226633938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164343181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82171593 + 82171594.

It is an arithmetic number, because the mean of its divisors is an integer number (82171594).

Almost surely, 2^164343187 is an apocalyptic number.

164343187 is a deficient number, since it is larger than the sum of its proper divisors (1).

164343187 is an equidigital number, since it uses as much as digits as its factorization.

164343187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 164343187 is about 12819.6406735914. The cubic root of 164343187 is about 547.7519112081.

The spelling of 164343187 in words is "one hundred sixty-four million, three hundred forty-three thousand, one hundred eighty-seven".