164857193 has 4 divisors (see below), whose sum is σ = 164883840. Its totient is φ = 164830548.

The previous prime is 164857183. The next prime is 164857201. The reversal of 164857193 is 391758461.

164857193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 391758461 = 2927 ⋅133843.

It is a cyclic number.

It is not a de Polignac number, because 164857193 - 2¹⁰ = 164856169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164857183) 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, 1328 + ... + 18206.

It is an arithmetic number, because the mean of its divisors is an integer number (41220960).

Almost surely, 2^164857193 is an apocalyptic number.

It is an amenable number.

164857193 is a deficient number, since it is larger than the sum of its proper divisors (26647).

164857193 is an equidigital number, since it uses as much as digits as its factorization.

164857193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26646.

The product of its digits is 181440, while the sum is 44.

The square root of 164857193 is about 12839.6726204370. The cubic root of 164857193 is about 548.3223734553.

The spelling of 164857193 in words is "one hundred sixty-four million, eight hundred fifty-seven thousand, one hundred ninety-three".