164393671 has 4 divisors (see below), whose sum is σ = 177039352. Its totient is φ = 151747992.

The previous prime is 164393657. The next prime is 164393693. The reversal of 164393671 is 176393461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176393461 = 89 ⋅1981949.

It is a cyclic number.

It is not a de Polignac number, because 164393671 - 2¹⁷ = 164262599 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 (164393371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6322821 + ... + 6322846.

It is an arithmetic number, because the mean of its divisors is an integer number (44259838).

Almost surely, 2^164393671 is an apocalyptic number.

164393671 is a deficient number, since it is larger than the sum of its proper divisors (12645681).

164393671 is a wasteful number, since it uses less digits than its factorization.

164393671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12645680.

The product of its digits is 81648, while the sum is 40.

The square root of 164393671 is about 12821.6095323481. The cubic root of 164393671 is about 547.8079927874.

The spelling of 164393671 in words is "one hundred sixty-four million, three hundred ninety-three thousand, six hundred seventy-one".