164671687 has 2 divisors, whose sum is σ = 164671688. Its totient is φ = 164671686.

The previous prime is 164671669. The next prime is 164671769. The reversal of 164671687 is 786176461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164671687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164671187) 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, 82335843 + 82335844.

It is an arithmetic number, because the mean of its divisors is an integer number (82335844).

Almost surely, 2^164671687 is an apocalyptic number.

164671687 is a deficient number, since it is larger than the sum of its proper divisors (1).

164671687 is an equidigital number, since it uses as much as digits as its factorization.

164671687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The square root of 164671687 is about 12832.4466490222. The cubic root of 164671687 is about 548.1166291892.

The spelling of 164671687 in words is "one hundred sixty-four million, six hundred seventy-one thousand, six hundred eighty-seven".