16672739 has 4 divisors (see below), whose sum is σ = 16681056. Its totient is φ = 16664424.

The previous prime is 16672729. The next prime is 16672741. The reversal of 16672739 is 93727661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93727661 = 641 ⋅146221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16672739 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 16672696 and 16672705.

It is not an unprimeable number, because it can be changed into a prime (16672729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902 + ... + 5844.

It is an arithmetic number, because the mean of its divisors is an integer number (4170264).

Almost surely, 2^16672739 is an apocalyptic number.

16672739 is a deficient number, since it is larger than the sum of its proper divisors (8317).

16672739 is an equidigital number, since it uses as much as digits as its factorization.

16672739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8316.

The product of its digits is 95256, while the sum is 41.

The square root of 16672739 is about 4083.2265428213. The cubic root of 16672739 is about 255.4674956065.

The spelling of 16672739 in words is "sixteen million, six hundred seventy-two thousand, seven hundred thirty-nine".