16321793 has 4 divisors (see below), whose sum is σ = 16346580. Its totient is φ = 16297008.

The previous prime is 16321787. The next prime is 16321801. The reversal of 16321793 is 39712361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14227984 + 2093809 = 3772^2 + 1447^2 .

It is a cyclic number.

It is not a de Polignac number, because 16321793 - 2⁶ = 16321729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16321733) 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, 11378 + ... + 12731.

It is an arithmetic number, because the mean of its divisors is an integer number (4086645).

Almost surely, 2^16321793 is an apocalyptic number.

It is an amenable number.

16321793 is a deficient number, since it is larger than the sum of its proper divisors (24787).

16321793 is an equidigital number, since it uses as much as digits as its factorization.

16321793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24786.

The product of its digits is 6804, while the sum is 32.

The square root of 16321793 is about 4040.0238860680. The cubic root of 16321793 is about 253.6623170885.

The spelling of 16321793 in words is "sixteen million, three hundred twenty-one thousand, seven hundred ninety-three".