16004393 has 4 divisors (see below), whose sum is σ = 16344960. Its totient is φ = 15663828.

The previous prime is 16004383. The next prime is 16004411. The reversal of 16004393 is 39340061.

16004393 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.

It is a cyclic number.

It is not a de Polignac number, because 16004393 - 2¹⁰ = 16003369 is a prime.

It is a super-2 number, since 2×16004393² = 512281190596898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16004353) 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, 170213 + ... + 170306.

It is an arithmetic number, because the mean of its divisors is an integer number (4086240).

Almost surely, 2^16004393 is an apocalyptic number.

It is an amenable number.

16004393 is a deficient number, since it is larger than the sum of its proper divisors (340567).

16004393 is an equidigital number, since it uses as much as digits as its factorization.

16004393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340566.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 16004393 is about 4000.5490873129. The cubic root of 16004393 is about 252.0072696735.

The spelling of 16004393 in words is "sixteen million, four thousand, three hundred ninety-three".