164256393 has 8 divisors (see below), whose sum is σ = 250295488. Its totient is φ = 93860784.

The previous prime is 164256361. The next prime is 164256427. The reversal of 164256393 is 393652461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164256393 - 2⁵ = 164256361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164256343) 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 7 ways as a sum of consecutive naturals, for example, 3910846 + ... + 3910887.

It is an arithmetic number, because the mean of its divisors is an integer number (31286936).

Almost surely, 2^164256393 is an apocalyptic number.

It is an amenable number.

164256393 is a deficient number, since it is larger than the sum of its proper divisors (86039095).

164256393 is an equidigital number, since it uses as much as digits as its factorization.

164256393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7821743.

The product of its digits is 116640, while the sum is 39.

The square root of 164256393 is about 12816.2550302341. The cubic root of 164256393 is about 547.6554667858.

The spelling of 164256393 in words is "one hundred sixty-four million, two hundred fifty-six thousand, three hundred ninety-three".