164006393 has 4 divisors (see below), whose sum is σ = 164069988. Its totient is φ = 163942800.

The previous prime is 164006389. The next prime is 164006411. The reversal of 164006393 is 393600461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 393600461 = 12721 ⋅30941.

It can be written as a sum of positive squares in 2 ways, for example, as 19333609 + 144672784 = 4397^2 + 12028^2 .

It is a cyclic number.

It is not a de Polignac number, because 164006393 - 2² = 164006389 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164006303) 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, 27758 + ... + 33143.

It is an arithmetic number, because the mean of its divisors is an integer number (41017497).

Almost surely, 2^164006393 is an apocalyptic number.

It is an amenable number.

164006393 is a deficient number, since it is larger than the sum of its proper divisors (63595).

164006393 is an equidigital number, since it uses as much as digits as its factorization.

164006393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63594.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 164006393 is about 12806.4980771482. The cubic root of 164006393 is about 547.3774798646.

The spelling of 164006393 in words is "one hundred sixty-four million, six thousand, three hundred ninety-three".