16948639 has 4 divisors (see below), whose sum is σ = 16969680. Its totient is φ = 16927600.

The previous prime is 16948619. The next prime is 16948691. The reversal of 16948639 is 93684961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93684961 = 67 ⋅1398283.

It is a cyclic number.

It is not a de Polignac number, because 16948639 - 2¹³ = 16940447 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 (16948619) 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, 9262 + ... + 10939.

It is an arithmetic number, because the mean of its divisors is an integer number (4242420).

Almost surely, 2^16948639 is an apocalyptic number.

16948639 is a deficient number, since it is larger than the sum of its proper divisors (21041).

16948639 is an equidigital number, since it uses as much as digits as its factorization.

16948639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21040.

The product of its digits is 279936, while the sum is 46.

The square root of 16948639 is about 4116.8724779862. The cubic root of 16948639 is about 256.8689496230.

The spelling of 16948639 in words is "sixteen million, nine hundred forty-eight thousand, six hundred thirty-nine".