164671693 has 4 divisors (see below), whose sum is σ = 164864700. Its totient is φ = 164478688.

The previous prime is 164671687. The next prime is 164671769. The reversal of 164671693 is 396176461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 396176461 = 10459 ⋅37879.

It can be written as a sum of positive squares in 2 ways, for example, as 104407524 + 60264169 = 10218^2 + 7763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164671693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164671643) 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 in 3 ways as a sum of consecutive naturals, for example, 95218 + ... + 96931.

It is an arithmetic number, because the mean of its divisors is an integer number (41216175).

Almost surely, 2^164671693 is an apocalyptic number.

It is an amenable number.

164671693 is a deficient number, since it is larger than the sum of its proper divisors (193007).

164671693 is an equidigital number, since it uses as much as digits as its factorization.

164671693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193006.

The product of its digits is 163296, while the sum is 43.

The square root of 164671693 is about 12832.4468828045. The cubic root of 164671693 is about 548.1166358463.

The spelling of 164671693 in words is "one hundred sixty-four million, six hundred seventy-one thousand, six hundred ninety-three".