16364321 has 4 divisors (see below), whose sum is σ = 16509252. Its totient is φ = 16219392.

The previous prime is 16364317. The next prime is 16364347. The reversal of 16364321 is 12346361.

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 4558225 + 11806096 = 2135^2 + 3436^2 .

It is a cyclic number.

It is not a de Polignac number, because 16364321 - 2² = 16364317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16364221) 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 3 ways as a sum of consecutive naturals, for example, 72296 + ... + 72521.

It is an arithmetic number, because the mean of its divisors is an integer number (4127313).

Almost surely, 2^16364321 is an apocalyptic number.

It is an amenable number.

16364321 is a deficient number, since it is larger than the sum of its proper divisors (144931).

16364321 is a wasteful number, since it uses less digits than its factorization.

16364321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144930.

The product of its digits is 2592, while the sum is 26.

The square root of 16364321 is about 4045.2837972137. The cubic root of 16364321 is about 253.8824398624.

The spelling of 16364321 in words is "sixteen million, three hundred sixty-four thousand, three hundred twenty-one".