16320687 has 4 divisors (see below), whose sum is σ = 21760920. Its totient is φ = 10880456.

The previous prime is 16320653. The next prime is 16320719. The reversal of 16320687 is 78602361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78602361 = 3 ⋅26200787.

It is a cyclic number.

It is not a de Polignac number, because 16320687 - 2⁸ = 16320431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16320637) 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, 2720112 + ... + 2720117.

It is an arithmetic number, because the mean of its divisors is an integer number (5440230).

Almost surely, 2^16320687 is an apocalyptic number.

16320687 is a deficient number, since it is larger than the sum of its proper divisors (5440233).

16320687 is an equidigital number, since it uses as much as digits as its factorization.

16320687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5440232.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 16320687 is about 4039.8870033703. The cubic root of 16320687 is about 253.6565873899.

The spelling of 16320687 in words is "sixteen million, three hundred twenty thousand, six hundred eighty-seven".