16639047 has 8 divisors (see below), whose sum is σ = 24650480. Its totient is φ = 11092680.

The previous prime is 16639027. The next prime is 16639057. The reversal of 16639047 is 74093661.

16639047 is a `hidden beast` number, since 16 + 639 + 0 + 4 + 7 = 666.

It is not a de Polignac number, because 16639047 - 2⁶ = 16638983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16639027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308104 + ... + 308157.

It is an arithmetic number, because the mean of its divisors is an integer number (3081310).

Almost surely, 2^16639047 is an apocalyptic number.

16639047 is a deficient number, since it is larger than the sum of its proper divisors (8011433).

16639047 is an equidigital number, since it uses as much as digits as its factorization.

16639047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616270 (or 616264 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 16639047 is about 4079.0987975287. The cubic root of 16639047 is about 255.2952980420.

The spelling of 16639047 in words is "sixteen million, six hundred thirty-nine thousand, forty-seven".