16384639 has 2 divisors, whose sum is σ = 16384640. Its totient is φ = 16384638.

The previous prime is 16384619. The next prime is 16384691. The reversal of 16384639 is 93648361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16384639 - 2⁵ = 16384607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16384609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8192319 + 8192320.

It is an arithmetic number, because the mean of its divisors is an integer number (8192320).

Almost surely, 2^16384639 is an apocalyptic number.

16384639 is a deficient number, since it is larger than the sum of its proper divisors (1).

16384639 is an equidigital number, since it uses as much as digits as its factorization.

16384639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The square root of 16384639 is about 4047.7943376609. The cubic root of 16384639 is about 253.9874701902.

The spelling of 16384639 in words is "sixteen million, three hundred eighty-four thousand, six hundred thirty-nine".